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Self-selection and bias in a large prospective pregnancy cohort in Norway
Roy M. Nilsen, Stein Emil Vollset, Håkon K. Gjessing, Rolv Skjærven, Kari K. Melve, Patricia Schreuder, Elin R. Alsaker, Kjell Haug, Anne Kjersti Daltveit, Per MagnusVolume:
23
Year:
2009
Language:
english
Pages:
12
DOI:
10.1111/j.1365-3016.2009.01062.x
File:
PDF, 155 KB
english, 2009