“…As shown in Multimedia Appendix 6 [ 3 , 5 , 6 , 10 , 12 , 14 , 16 , 17 , 20 , 30 , 33 , 34 , 36 , 37 , 42 , 45 , 46 , 49 - 54 , 56 - 59 , 61 - 64 , 66 - 71 , 73 , 74 , 77 , 78 , 83 , 85 - 88 , 90 - 101 , 103 , 105 - 107 , 109 , 111 ], a total of 33 different robotic platforms were investigated in the included studies. Among them, the most popular robotic platforms are Pepper, Paro, Nao, iRobiQ, and Healthbot.…”