Observational studies and randomized trials [2] (multiple letters)
- Kunz, R.
- Khan, K.S.
- Neumayer, H.-H.
ISSN: 0028-4793
Année de publication: 2000
Volumen: 343
Número: 16
Pages: 1194-1197
Type: Lettre
Revue:
New England Journal of Medicine