AU  - Ioannidis JA
TI  - THe importance of potential studies that have not existed and registration of observational data sets
PT  - JOUR
DP  - 2012
TA  - JAMA
pages = {575-576},
VI  - 308
IP  - 6
AID  - 10.1001/jama.2012.8144 [doi]
4100  - http://dx.doi.org/10.1001/jama.2012.8144
SO  - JAMA August 8, 2012 308(6):575