The authors aimed to elucidate the relation of the time-dependent smoking history parameters—age at smoking initiation and smoking intensity, duration, and latency—to the risk of Warthin's tumor, a benign tumor of the salivary gland for which cigarette smoking is a

Health-care-associated methicillin-resistant Staphylococcus aureus (MRSA) infection may cause increased hospital stay, or sometimes death. Quantifying this effect is complicated because the exposure is time dependent: infection may prolong hospital stay, while longer stays increase infection risk. In this paper, the