Study Designs for Clinical and Epidemiological Research in Romanian lecture by Carla J.Alvarado Uploading date: September 14, 2012

Original English lecture  - http://www.pitt.edu/~super1/lecture/lec5811/index.htm

This lecture in Russian - http://www.pitt.edu/~super1/lecture/lec5801/index.htm

Translated into Romanian by Dr. Stelian Baraitareanu, Bucharest, Romania