“…All the studies stated the weight range of the rats, which ranged from 180 to 490 g. A total of 7 of the 16 studies mentioned the age of the animals [ 11 , 14 , 16 – 18 , 23 , 25 ], which ranged from 2 months old to 12 months old. Sixteen of the included studies used different subtests of the Morris water maze test; all the studies met the inclusion criteria by using escape latency as outcome data, while two studies used swimming speed [ 24 , 26 ], five studies used duration in the quadrant of the former platform position [ 12 , 13 , 21 , 24 , 26 ], one used swimming distance [ 19 ], and three used frequency of crossing former platform [ 12 , 15 , 16 ]. Two species of rats were used in the 16 studies: seven studies used Sprague–Dawley (SD) rats [ 11 , 13 , 15 , 17 – 19 , 25 ], and nine studies used Wistar rats [ 12 , 14 , 16 , 20 – 24 , 26 ].…”