“…3 . There were 12 studies contributing 870 sural nerves conducted in Europe [ 28 , 29 , 33 , 36 , 39 , 43 , 45 , 47 , 48 , 50 , 54 , 55 ], 6 contributing 504 sural nerves in East Asia [ 26 , 30 , 31 , 42 , 49 , 52 ], 4 contributing 435 sural nerves in North America [ 10 , 32 , 35 , 41 ], 3 contributing 736 sural nerves in South Asia [ 34 , 46 , 53 ], 3 contributing 27 sural nerves in Oceania [ 37 , 51 ], 2 contributing 447 sural nerves in Southeast Asia [ 11 , 40 ] and 2 contributing 174 sural nerves in the Middle East [ 27 , 44 ]. Seven of the European studies which contributed 438 sural nerves were conducted in Germany [ 28 , 33 , 36 , 43 , 47 , 48 , 50 ].…”