Reminding peer reviewers of reporting guideline items to improve completeness in published articles: primary results of 2 randomized trials by Speich, B, Mann, E, Schönenberger, CM, Mellor, K, Griessbach, AN, Dhiman, P, Gandhi, P, Lohner, S, Agarwal, A, Odutayo, A, Puebla, I, Clark, A, Chan, A-W, Schlussel, MM, Ravaud, P, Moher, D, Briel, M, Boutron, I, Schroter, S, Hopewell, S