This is where the note is introduced the first time[(Yang2009a>Yang, Seung-Heon, Yong Hwy Kim, Jin Wook Kim, Chul-Kee Park, Sung-Hye Park, and Hee-Won Jung. 2009. “Methylation Status of the O6-Methylguanine-Deoxyribonucleic Acid Methyltransferase Gene Promoter in World Health Organization Grade III Gliomas.” Journal of Korean Neurosurgical Society 46 (4) (October): 385–388. doi:10.3340/jkns.2009.46.4.385.)].
And here is another reference[(Yang2009a)] to the same note. And yet another reference[(Yang2009a)].

~~REFNOTES~~