Lung squamous cell carcinoma with severe hypomagnesemia due to cisplatin plus gemcitabine in combination with necitumumab therapy: A case report oleh Akira Nakao, Hiroyuki Inoue, Yusuke Osaki, Ryosuke Hirano, Taishi Harada, Takashi Aoyama, Fumiyasu Igata, Masaki Fujita