1. Cobb JP (1990) Why use drains? J Bone Jt Surg-British Volume 72:993–995
2. Detsky AS, Naylor CD, O’Rouke K, McGeer AJ, L’Abbe K (1992) Incorporating variations in the quality of individual randomized trials into meta-analysis. J Clin Epidemiol 45:225–265
3. Duranthon LD, Grimberg J, Vandenbussche E, Mondoloni B, Augereau P (2000) L’efficacite du drainage postoperatoire apres arthroplastie par prothese intermediaire scellee pour fracture du col du femur; resultats d’une etude prospective randomisee de 86 cas [Effectiveness of postoperative drainage after bipolar sealed endoprosthetic arthroplasty for femur neck fracture. Results of a prospective randomized study of 86 cases]. [French]. Rev Chir Orthop Repar Appar Mot 86(4):370–372
4. Higgins JPT, Thompson SG, Deeks JJ, Altman DG (2003) Measuring inconsistency in meta-analyses. BMJ 327:556–560
5. Lautenbach EEG, Tiemessen CH, Cunningham S (2000) How effective is suction drainage? South African Bone and Joint Surgery 10(3):14–17