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Lua i Stíl Chicago (17ú heag.)Olsén, M., H. Elden, E. Janson, H. Lilja, agus E. Stener-Victorin. A Comparison of High- Versus Low-intensity, High-frequency Transcutaneous Electric Nerve Stimulation for Painful Postpartum Uterine Contractions. 2007.
Lua MLA (9ú heag.)Olsén, M., et al. A Comparison of High- Versus Low-intensity, High-frequency Transcutaneous Electric Nerve Stimulation for Painful Postpartum Uterine Contractions. 2007.
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