[1] Merck & Co.,Department of Pharmacoepidemiology
[2] Inc.,Department of Clinical Safety and Risk Management
[3] Merck & Co.,Department of Global Clinical Development
[4] Inc.,Pharmaceutical Health Services Research, School of Pharmacy
[5] Safety Surveillance and Risk Management,undefined
[6] Pfizer Inc.,undefined
[7] Safety Surveillance and Risk Management,undefined
[8] Pfizer Inc.,undefined
[9] Merck & Co.,undefined
[10] Inc.,undefined
[11] University of Maryland,undefined