Technical note: Improved ancient DNA purification for PCR using ion‐exchange columns Kwon‐Jong Yoo, Maengseok Noh, Ki‐Won Park, Ae Ja Park, Dashtseveg Tumen, Gavaachimed Lkhagvasuren, Youn‐Ock Cho, Ariunaa Togloom, Eunhee Jeon, Kyung‐Yong Kim, Mi‐Sook Lee, Ki‐Cheol Kim, J.H. Choi, K.H. Lee, K. Kim, J.H. Kim • 2008