Reliability of trial information across registries for trials with multiple registrations: a systematic review by Speich, B, Gloy, VL, Klatte, K, Marian, IR, Lee, H, Mansouri, A, Hopewell, S

Nonregistration, discontinuation, and nonpublication of randomized trials: a repeated metaresearch analysis by Speich, B, Gryaznov, D, Busse, JW, Gloy, VL, Lohner, S, Klatte, K, Taji Heravi, A, Ghosh, N, Lee, H, Mansouri, A, Marian, IR, Saccilotto, R, Nury, E, Kasenda, B, Ojeda-Ruiz, E, Schandelmaier, S, Tomonaga, Y, Amstutz, A, Pauli-Magnus, C, Bischoff, K, Wollmann, K, Rehner, L, Meerpohl, JJ, Nordmann, A, Wong, J, Chow, N, Hong, PJ, Mc Cord-De Iaco, K, Sricharoenchai, S, Agarwal, A, Schwenkglenks, M, Hemkens, LG, von Elm, E, Copsey, B, Griessbach, AN, Schönenberger, C, Mertz, D, Blümle, A, von Niederhäusern, B, Hopewell, S, Odutayo, A, Briel, M