TY  - RPRT
TI  - Secondary endpoints cannot be validly analyzed if the primary endpoint does not demonstrate clear statistical significance.
AU  - R T O'Neill
PY  - 1997
DO  - 10.1016/s0197-2456(97)00075-5
UR  - https://pubmed.ncbi.nlm.nih.gov/9408717/
ID  - 9408717
ER  -