Authors: Fujian Song; Sheetal Parekh-Bhurke; Lee Hooper; Yoon K Loke; Jon J Ryder; Alex J Sutton; Caroline B Hing; Ian Harvey Journal: BMC Med Res Methodol Date: 2009-11-26 Impact factor: 4.615
Authors: Roberta W Scherer; Joerg J Meerpohl; Nadine Pfeifer; Christine Schmucker; Guido Schwarzer; Erik von Elm Journal: Cochrane Database Syst Rev Date: 2018-11-20