TY  - GEN
AU  - D'Amico,R
AU  - Deeks,J J
AU  - Altman,D G
TI  - Numbers needed to treat derived from meta-analysis. Length of follow up is poorly reported
SN  - 0959-8138
PY  - 1999///1216
KW  - Follow-Up Studies
KW  - Risk Assessment
KW  - Sample Size
KW  - Time Factors
N1  - Publication Type: Comment; Letter
ER  -