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Influence of estrogen-progestin replacement therapy and exercise on lumbar spine mobility and low back symptoms in a healthy early postmenopausal female population: a 2-year randomized controlled trial.
Kyllönen ES, Heikkinen JE, Väänänen HK, Kurttila-Matero E, Wilen-Rosenqvist G, Lankinen KS, Vanharanta JH. Kyllönen ES, et al. Among authors: vanharanta jh. Eur Spine J. 1998;7(5):381-6. doi: 10.1007/s005860050094. Eur Spine J. 1998. PMID: 9840471 Free PMC article. Clinical Trial.