Regulation of mycobacterial infection by macrophage Gch1 and tetrahydrobiopterin by McNeill, E, Stylianou, E, Crabtree, M, Harrington-Kandt, RL, Kolb, AL, Diotallevi, M, Hale, A, Bettencourt, PJG, Tanner, R, O'Shea, M, Matsumiya, M, Lockstone, H, Muller, J, Fletcher, H, Greaves, D, McShane, H, Channon, K