“…Fourteen PVT patients were donors after brain death (n = 14, 27.4%) [95,109] and seven patients had no medical history (n = 7, 13.7%) [4,5,52,64,66], however, some of the patients had a past drug history of regular intake of oral contraceptive pills (n = 6, 11.5%) [31,51,53,54,64,111,116]. Few PVT patients had preexisting diabetes mellitus (n = 3) [56,59,67], migraine (n = 3) [51,65,111], thyroid gland disorders [hypothyroidism and goiter] (n = 4), and obesity (n = 3) [61,63,116]. Nevertheless, medical history was not reported for five PVT cases [3,30,62,91,98] [3-5, 49, 51-59, 61, 63, 65, 66, 76, 96, 111, 116] and few PVT patients were in a coma (n = 3, 5.9%) [64].…”