Multiple combination therapy based on intrathecal pemetrexed in non-small cell lung cancer patients with refractory leptomeningeal metastasis - Miao, Qian; Zheng, Xiaobin; Zhang, Longfeng; Jiang, Kan; Wu, Biao; Lin, Gen (Annals of Palliative Medicine; Vol 9, No 6 (November 30, 2020): Annals of Palliative Medicine, 2020)