Wu SY, Xing F, Sharma S, Wu K, Tyagi A, Liu Y, Zhao D, Deshpande RP, Shiozawa Y, Ahmed T, Zhang W, Chan M, Ruiz J, Lycan TW, Dothard A, Watabe K. Nicotine promotes brain metastasis by polarizing microglia and suppressing innate immune function. J Exp Med. 2020 08 03; 217(8).