Erratum to: Auxiliary midwives in hard to reach rural areas of Myanmar: filling MCH gaps - Sangay Wangmo; Rapeepong Suphanchaimat; Wai Mar Mar Htun; Tin Tun Aung; Chiraporn Khitdee; Walaiporn Patcharanarumol; Pe Thet Htoon; Viroj Tangcharoensathien (BMC, 2016)