Researches into the regional distribution of eye disease. MANN I. Am J Ophthalmol. 1959 May;47(5):134-44. doi: 10.1016/s0002-9394(14)78236-4. PMID: 13649852
Epidemiological economics. Frick KD. Ophthalmic Epidemiol. 2008 Mar-Apr;15(2):73-5. doi: 10.1080/09286580701843820. PMID: 18432489
How should we evaluate a cohort study? Study design. Klein R, Klein BE. Ophthalmology. 1997 Oct;104(10):1533-4. doi: 10.1016/s0161-6420(97)30097-9. PMID: 9331189
Clinical epidemiology: what, why and how?. Nath R, Ahuja RC, Kumar S. Indian J Ophthalmol. 1995 Jun;43(2):83-7. PMID: 8818319 Free Article