Dickert, N;
DeRiemer, K;
Duffy, PE;
Garcia-Garcia, L;
Mutabingwa, TK;
Sina, BJ;
Tindana, P;
Lie, R;
(2007)
Ancillary-care responsibilities in observational research: two cases, two issues.
Lancet, 369 (9564).
pp. 874-877.
ISSN 0140-6736
DOI: https://doi.org/10.1016/S0140-6736(07)60416-4