[1] Ottawa Hosp Res Inst, Clin Epidemiol Program, Ottawa, ON, Canada
[2] Ottawa Hosp, Otolaryngol Head & Neck Surg Dept, Ottawa, ON, Canada
[3] Aarhus Univ, Dept Clin Med & Otolaryngol Head & Neck Surg, Aarhus, Denmark
[4] Spanish Med & Healthcare Prod Agcy, Div Pharmacoepidemiol & Pharmacovigilance, Madrid, Spain
[5] Inst Hlth Res Aragon, Zaragoza, Spain
[6] Aragon Hlth Sci Inst, Data Sci Hlth Serv & Policy Res, Zaragoza, Spain
[7] Inst Hlth Carlos III, Res Network Chron Primary Care & Hlth Promot, Madrid, Spain
[8] Inst Hlth Carlos III, Natl Sch Publ Hlth, Dept Hlth Planning & Econ, Madrid, Spain
[9] Inst Hlth Carlos III, Ctr Biomed Res Mental Hlth Network CIBERSAM, Madrid, Spain