“…Among 39 ‘short’ experiments [25, 39, 40, 46, 52, 55, 57, 64, 69, 70, 72, 76, 78, 81, 88, 90, 94, 95, 101, 103, 104, 105, 107, 108, 112, 115, 125, 129, 130, 132, 133, 135, 136, 138, 140, 145, 146, 148,] 14 (35.9%) showed a decreased RVR, 4 (10.3%) no change in RVR, and 21 (53.8%) an increase in RVR. Among the 98 ‘long’ observation time studies [20, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 41, 42, 43, 44, 45, 47, 48, 49, 50, 51, 53, 54, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 71, 73, 74, 75, 77, 79, 80, 82, 83, 84, 85, 86, …”