title: Author's reply.
authors.affiliation: Department of Orthopedic Surgery, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, 10700, Thailand.
authors.forename: Chaturong
authors.initials: C
authors.lastname: Pornrattanamaneewong
authors.forename: Surin
authors.initials: S
authors.lastname: Numkanisorn
authors.forename: Keerati
authors.initials: K
authors.lastname: Chareancholvanich
authors.forename: Thossart
authors.initials: T
authors.lastname: Harnroongroj