Evidence of publication bias in multiple sclerosis clinical trials: A comparative analysis of published and unpublished studies registered in ClinicalTrials.gov

1. Rivero-De-Aguilar, A.
2. Pérez-Ríos, M.
3. Ruano-Raviña, A.
4. Candal-Pedreira, C.
5. Puente-Hernandez, M.
6. Ross, J.S.
7. Varela-Lema, L.