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Holroyd KA, Penzien DB.Holroyd KA, et al. Among authors: penzien db.Pain. 1990 Jul;42(1):1-13. doi: 10.1016/0304-3959(90)91085-W.Pain. 1990.PMID: 2146583Clinical Trial.
Rains JC, Penzien DB, Martin VT.Rains JC, et al. Among authors: penzien db.J Am Med Womens Assoc (1972). 2002 Spring;57(2):73-8.J Am Med Womens Assoc (1972). 2002.PMID: 11991424Review.