RT Journal
A1 Zuckerman D
T1 Hip implant failure for men and women: What and when we need to know comment on “sex and risk of hip implant failure”
JF JAMA Internal Medicine
JO JAMA Internal Medicine
YR 2013
FD March 25
VO 173
IS 6
SP 442
OP 443
DO 10.1001/jamainternmed.2013.19
UL http://dx.doi.org/10.1001/jamainternmed.2013.19
AB 
In the European Union and the United States, orthopedic implants and many other implanted medical devices are not required to be studied in clinical trials before being sold. In Europe, implant registries can provide postmarket data years later; such registry data were the basis of the warnings and recall of some metal on metal (MOM) hip implants in 2010 and 2011.2