'Why me?' versus 'why now?'--differences between operational hypotheses in case-control versus case-crossover studies
Benzodiazepines and elderly drivers: a comparison of pharmacoepidemiological study designs
Lethal drug probe in China: the case of Xinfu clindamycin
Relationship between therapeutic use and abuse of opioid analgesics in rural, suburban, and urban locations in the United States
Use of anxiolytic or hypnotic drugs and total mortality in a general middle-aged population