Peiling Wang, Professor, University of Tennessee-Knoxville & Dietmar Wolfram, Professor, University of Wisconsin-Milwaukee In a recent open-access (OA) peer-reviewed article1, we report on the rapid growth of open peer review (OPR) journals from ... One of the major contributing publishers is MDPI which lists 204 OPR journals, with 128 and 63 OPR titles added in 2018 and 2019, respectively.