Results 221 to 228 of about 6,560,569 (228)
Some of the next articles are maybe not open access.

Locating Study Subjects

Controlled Clinical Trials, 2001
Enrique Menendez   +2 more
openaire   +1 more source

Subjects Needed for Study

New England Journal of Medicine, 1951
openaire   +1 more source

Study of Healthy Subjects

Acta Medica Scandinavica, 1964
openaire   +1 more source

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