E. Guallar, J. Conde, M. de la Cal, and J. Martín-Moreno. Medicina clínica, 108 (12):
460-71(March 1997)5007<m:linebreak></m:linebreak>LR: 20041117; JID: 0376377; ppublish;<m:linebreak></m:linebreak>Protocol.
G. Nabel. Science (New York, N.Y.), 326 (5949):
53-4(October 2009)5361<m:linebreak></m:linebreak>JID: 0404511; ppublish;<m:linebreak></m:linebreak>Recursos/Organització; Recerca clínica.
R. van der Graaf, K. Roes, and J. van Delden. JAMA : the journal of the American Medical Association, 307 (22):
2379-80(June 2012)6707<m:linebreak></m:linebreak>Disseny; Dissenys adaptatius; RCT; Ètica.
L. Fraker, E. Orsay, E. Sloan, E. Bunney, J. Holden, and R. Hart. The Journal of emergency medicine, 14 (4):
503-8(1996)4139<m:linebreak></m:linebreak>LR: 20041117; PUBM: Print; JID: 8412174; ppublish;<m:linebreak></m:linebreak>Recursos/Organització; Formació.
P. McDonald, A. Kulkarni, F. Farrokhyar, and M. Bhandari. Canadian journal of surgery. Journal canadien de chirurgie, 53 (2):
133-6(April 2010)5580<br/>JID: 0372715; 0 (Placebos); OID: NLM: PMC2845955; ppublish;<br/>Ètica; Disseny; Cirurgia.