(Q43575606)
Statements
Screening for diabetic retinopathy with or without a copayment in a randomized controlled trial: influence of the inverse care law (English)
Sarah M McGhee
Rita A Gangwani
Anthony J Hedley
Cindy Lo Kuen Lam
Wico W Lai
Daniel Wai Sing Chu
David S H Wong
12 April 2013