Effect of Recruitment Methods on Response Rate in a Web-Based Study for Primary Care Physicians: Factorial Randomized Controlled Trial

Ryuhei So   ^{1, 2} , MD, MPH ;   Kiyomi Shinohara   ¹ , MD, PhD ;   Takuya Aoki   ³ , MD, MMA ;   Yasushi Tsujimoto   ³ , MD, MPH ;   Aya M Suganuma   ¹ , MD, MChem ;   Toshi A Furukawa   ¹ , MD, PhD

¹ Department of Health Promotion and Human Behavior, Graduate School of Medicine/School of Public Health, Kyoto University, Kyoto, Japan

² Okayama Psychiatric Medical Center, Okayama, Japan

³ Department of Healthcare Epidemiology, Graduate School of Medicine/School of Public Health, Kyoto University, Kyoto, Japan