| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
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| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 7.1 | 
 
| E.1.2 | Level  | LLT | 
 
| E.1.2 | Classification code  | 10028417 | 
 
 
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| E.1.3 | Condition being studied is a rare disease  |  Yes  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
| is to assess the efficacy of mycophenolate mofetil therapy compared to placebo in myasthenia gravis patients receiving prednisone | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
| is to assess the safety and tolerability of mycophenolate mofetil therapy compared to placebo in mysthenia gravis patients receiving prednisone | 
 
 
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| E.2.3 | Trial contains a sub-study  |  Information not present in EudraCT  | 
| E.3 | Principal inclusion criteria  | 
Subject of either sex, 18 to 80 years of age (inclusive) diagnosis of MG meeting all of the following criteria: history of myasthenic weakness involving more than ocular or peri-ocular muscles history of positive edrophonium chloride test OR abnormal neuromuscular transmission demonstrated by electrodiagnostic testing history of elevated AChR antibodies disease severity history: Myasthenia Gravis Foundation of America (MGFA) classification II, III, or IVa duration of MG symptoms (including ocular symptoms) ≤ 10 years requirement of immunosuppressive therapy in the judgment of the investigator prednisone dose of ≥20mg/day (or equivalent alternate day dose) for at least 4 weeks prior to randomization if subject is taking a cholinesterase inhibitor (i.e. pyridostigmine bromide), a stable regimen is required for at least 2 weeks prior to randomization | 
 
 
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| E.4 | Principal exclusion criteria | 
pregnancy, breastfeeding, or lactation receiving regularly scheduled plasma exchange (PE) or intravenous immunoglobulin (IVIG) treatment or receiving PE or IVIG treatment within 2 weeks prior to randomization receiving MMF or other immunosuppressant therapy (except corticosteroids) within 8 weeks prior to randomization any prior clinically significant use of MMF or other immunosuppressant therapy (except corticosteroids) severe weakness of oropharyngeal and/or respiratory muscles (MGFA Class IVb or V; compromised airway protection; MG crisis or impending crisis) thymoma thymectomy within 6 months prior to randomization presence or history of: severe active gastrointestinal disease; persistent severe diarrhea; gastrointestinal hemorrhage active unhealed peptic ulcer within 3 months prior to randomization immune deficiency malignancy lymphoproliferative disease or previous total lymphoid irradiation chronic or frequent drug-resistant bacterial infections or presence of active infection requiring antimicrobial treatment frequent and/or serious viral infection systemic or invasive fungal disease within 2 years prior to randomization significant kidney or liver dysfunction pulmonary insufficiency requiring supplemental oxygen bone marrow insufficiency | 
 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
Treatment groups will be compared to measure the proportion of subjects reaching responder status. A subject will be considered a responder if he or she meets all the following criteria: Minimal Manifestations or Pharmacologic Remission (MGFA Postintervention Status definitions modified) from Week 32 until study termination at Week 36 AND Prednisone dose of not more than 7.5 mg/day from Week 32 until study termination at Week 36 AND Cholinesterase inhibitor dose of ≤120 mg/day from Week 33* until study termination at Week 36 *subjects have one week to reduce cholinesterase inhibitor dose after reaching 7.5mg/day prednisone 
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| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  No  | 
| E.6.3 | Therapy |  Yes  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  Yes  | 
| E.6.6 | Pharmacokinetic |  Yes  | 
| E.6.7 | Pharmacodynamic |  No  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  No  | 
| E.6.10 | Pharmacogenetic |  Information not present in EudraCT  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  No  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  Information not present in EudraCT  | 
| E.7.1.1 | First administration to humans |  Information not present in EudraCT  | 
| E.7.1.2 | Bioequivalence study |  Information not present in EudraCT  | 
| E.7.1.3 | Other |  Information not present in EudraCT  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  Information not present in EudraCT  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  Yes  | 
| E.7.4 | Therapeutic use (Phase IV) |  Information not present in EudraCT  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  Yes  | 
| E.8.1.1 | Randomised |  Yes  | 
| E.8.1.2 | Open |  No  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  Yes  | 
| E.8.1.5 | Parallel group |  Yes  | 
| E.8.1.6 | Cross over  |  No  | 
| E.8.1.7 | Other |  No  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  No  | 
| E.8.2.2 | Placebo  |  Yes  | 
| E.8.2.3 | Other |  No  | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  No  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  Yes  | 
| E.8.5 | The trial involves multiple Member States |  Yes  | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  Yes  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  Information not present in EudraCT  | 
| E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned | 
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| E.8.7 | Trial has a data monitoring committee |  Information not present in EudraCT  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
                     |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 3 | 
| E.8.9.1 | In the Member State concerned months |  | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial years | 3 |