References
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- Ask-Upmark, E. (1945) Svenska Lakartidningen
- Ask-Upmark, E.
- Ask-Upmark, E. (1940) Acta Med. Scand., 103, p. 280.
- Ask-Upmark, E. and Berg, Eusabeth (1943) Acta Med. Scand., 113, p. 467.
- Stenstam, Toivo (1946) Acta Med. Scand.