A comparison of high- versus low-intensity, high-frequency transcutaneous electric nerve stimulation for painful postpartum uterine contractions.
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Olsén MF, Elden H, Janson ED, Lilja H, Stener-Victorin E
Acta Obstet Gynecol Scand. 2007; 86(3):310-4
PMID: 17364305