Resistance mechanisms and genetic relatedness among carbapenem-resistant Pseudomonas aeruginosa isolates from three major hospitals in Hanoi, Vietnam (2011–15) by Tran, HA, Vu, TNB, Trinh, ST, Tran, DL, Pham, HM, Ngo, THH, Nguyen, MT, Tran, ND, Pham, DT, Dang, DA, Shibayama, K, Suzuki, M, Yoshida, L-M, Trinh, HS, Le, VT, Vu, PT, Luu, TVN, Bañuls, A-L, Trinh, KL, Tran, VA, Tran, HH, van Doorn, HR