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and Shivanand Karigar1, S. N. Suresh1,2*,. 2010. “A Randomised Clinical Trial to Compare the Post Dural Puncture Headache Following Spinal Anaesthesia Using 27 G Quincke’s and 27 G Whitacre’s Spinal Needles”. Recent Research in Science and Technology 2 (5). https://www.updatepublishing.com/journal/index.php/rrst/article/view/442.