Confounding in the Association of Proton Pump Inhibitor Use With Risk of Community-Acquired Pneumonia

[11] Holm A(2004)How much should We trust differences-in-differences estimates? Q J Econ 119 249-275

[12] Frederiksen H(2002)Employer drug benefit plans and spending on prescription drugs JAMA 288 1733-1739

[13] Jensen TG(2006)Benefit design and specialty drug use Health Aff (Millwood) 25 1319-1331

[14] Pedersen C(2004)Pharmacy benefits and the use of drugs by the chronically ill JAMA 291 2344-2350

[15] Hallas J(2009)Cost sharing and the initiation of drug therapy for the chronically ill Arch Intern Med 169 740-748

[16] Howden CW(2002)Epidemiology of urinary tract infections: incidence, morbidity, and economic costs Am J Med 113 5S-13S

[17] Hunt RH(2006)Cellulitis incidence in a defined population Epidemiol Infect 134 293-299

[18] Giannella RA(1990)Longitudinal and cross-sectional estimates of pulmonary function decline in never-smoking adults Am J Epidemiol 132 685-700

[19] Broitman SA(1997)Gastric acid, acid-suppressing drugs, and bacterial gastroenteritis: how much of a risk? Epidemiology 8 571-574

[20] Zamcheck N(1996)Omeprazole as a risk factor for campylobacter gastroenteritis: case–control study BMJ 312 414-415

[11] Holm A(2004)How much should We trust differences-in-differences estimates? Q J Econ 119 249-275

[12] Frederiksen H(2002)Employer drug benefit plans and spending on prescription drugs JAMA 288 1733-1739

[13] Jensen TG(2006)Benefit design and specialty drug use Health Aff (Millwood) 25 1319-1331

[14] Pedersen C(2004)Pharmacy benefits and the use of drugs by the chronically ill JAMA 291 2344-2350

[15] Hallas J(2009)Cost sharing and the initiation of drug therapy for the chronically ill Arch Intern Med 169 740-748

[16] Howden CW(2002)Epidemiology of urinary tract infections: incidence, morbidity, and economic costs Am J Med 113 5S-13S

[17] Hunt RH(2006)Cellulitis incidence in a defined population Epidemiol Infect 134 293-299

[18] Giannella RA(1990)Longitudinal and cross-sectional estimates of pulmonary function decline in never-smoking adults Am J Epidemiol 132 685-700

[19] Broitman SA(1997)Gastric acid, acid-suppressing drugs, and bacterial gastroenteritis: how much of a risk? Epidemiology 8 571-574

[20] Zamcheck N(1996)Omeprazole as a risk factor for campylobacter gastroenteritis: case–control study BMJ 312 414-415