“…A total of 20 papers were published between 1922 and 1940 18–37 and seven in the period of World War II (1942–1945; Table 2). 38–44 The majority of the articles originated from the USA ( n = 25) 12,13,18,20,22–30,32–36,38–44 with six from the United Kingdom (UK) 14–17,19,31 and one each from Austria 21 and Canada 37 . Nineteen articles were case reports, 13,15,16,17,19–22,24,26,28,29,31,33,34,37,39.42,44 five were original research articles, 27,30,36,40,43 three were correspondence, 18,25,32 three were conference abstracts, 12,14,35 two were classifications and guidelines 38,41 and one was a review 23 .…”