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Hongell A, Mattsson HS.Hongell A, et al. Among authors: mattsson hs.Nord Med. 1971 May 20;85(20):635.Nord Med. 1971.PMID: 4325637Swedish.No abstract available.
Hedstrand U, Mattsson HS.Hedstrand U, et al. Among authors: mattsson hs.Lakartidningen. 1975 Feb 26;72(9):840-1.Lakartidningen. 1975.PMID: 1128152Swedish.No abstract available.