Recruitment barriers in a randomized controlled trial from the physicians' perspective – A postal survey
Anne Spaar, Martin Frey, Alexander Turk, Werner Karrer, Milo A PuhanVolume:
9
Language:
english
DOI:
10.1186/1471-2288-9-14
Date:
December, 2009
File:
PDF, 778 KB
english, 2009