| Anita Sik Yau Kan The role and comparison of two techniques of paracervical block for pain relief during suction evacuation for first-trimester pregnancy terminationAnita Sik Yau Kan Department of Obstetrics and Gynaecology, The University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, China Contraception 70:159-63. 2004 A double-blind, randomized controlled trial on the use of a 50:50 mixture of nitrous oxide/oxygen in pain relief during suction evacuation for the first trimester pregnancy terminationAnita Sik Yau Kan Department of Obstetrics and Gynaecology, Operation Theatre Service, Queen Mary Hospital, The University of Hong Kong, Hong Kong Special Administrative Region, People s Republic of China Hum Reprod 21:2606-11. 2006
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