Induction of hypoxia-inducible factor-1alpha overexpression by cobalt chloride enhances cellular resistance to photodynamic therapy
Cancer Letters (2006) - Comment
pubmed: 16427735  doi: 10.1016/j.canlet.2005.12.010  issn: 0304-3835 

Zhenyu Ji, Guanrui Yang, Susan Shahzidi, Kinga Tkacz-Stachowska, Zhenhe Suo, Jahn M. Nesland, Qian Peng