Putanga 1: I te tau 1999, i whakawhanakehia e Shelstad tētahi ariā o te endoscopy hurihuri me Robert Kottwitz. I te tau 2008 -- 9 ka oti i a ia te mahi i runga i te endoscopy whakahinuhinu. Putanga 2: I te tau 1999, i whakawhanakehia e Robert Kottwitz tētahi ariā o te endoscopy hurihuri me Shelstad, ā, i whakaotihia te mahi i runga i te endoscopy whakapakari i te tau 2008 -- 9. Pātai: He ōrite te tikanga o te rerenga 1 me te rerenga 2? He Ae, he Kore rānei?
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