Comparative effectiveness of lidocaine sprays between sitting and supine position for patients undergoing upper gastrointestinal endoscopy: a prospective randomized controlled trial
1996 ◽
Vol 43
(4)
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pp. 310
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2011 ◽
Vol 106
◽
pp. S543
2011 ◽
Vol 1
(1)
◽
pp. 14