Is there a relationship between elderly suicide rates and smoking?
There is a case for examination of the relationship between smoking and elderly suicides in individual-level cohort or case-control studies because of the potential methodological difficulties in cross-national studies using national- level aggregate data, paucity of cohort or case-control studies at an individual-level in the elderly, and the observation of an independent relationship between smoking and completed suicides in individual-level cohort and case-control studies in younger age groups.
Despite our data showing FcR-dependent stimulation of DC in vitro, Ab-mediated immunity to C. burnetii in vivo is FcR-independent. We also found that passive immunity to this pathogen is independent of complement.