David F Marks@david_f_marksOnce again, the PACE authors respond to concerns with empty answers - Apr 27, 2017 http://journals.sagepub.com/doi/full/10.1177/1359105317703788#.WQHuZsKSA7Y.twitter…1:13 PM · Apr 27, 2017·Twitter Web Client19 Retweets19 Likes