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Anyone really. However, in the case of a complicated [[Colon|colon]], having a [[Gastroenterologist|gastroenterologist]] perform it may not be a bad idea. Thanks to their training, they can employ advanced colonoscopic maneuvers such as the [http://gomerblog.com/2016/12/miley-cyrus-myoclonic-twerks/ twerk].<ref>[http://gomerblog.com/2013/09/advanced-colonoscopy-technique/ Gastroenterologist Discovers Advanced Colonoscopy Technique, Twerk Position, While Working on Miley Cyrus]</ref>