DNA COLLECTION IN A RANDOMIZED SOCIAL SCIENCE STUDY OF COLLEGE PEER EFFECTS.Published in:Sociological Methodology, 2009, v. 39, n. 1, p. 1, doi. 10.1111/j.1467-9531.2009.01214.xBy:Guo, Guang;Hardie, Jessica Halliday;Owen, Craig;Daw, Jonathan K.;Fu, Yilan;Lee, Hedwig;Lucas, Amy;McKendry-Smith, Emily;Duncan, GregPublication type:Article