title: Comment on "Physical origin and generic control of magnonic band gaps of dipole-exchange spin waves in width-modulated nanostrip waveguides".
authors.affiliation: Department of Physics, National University of Singapore, Singapore 117542.
authors.forename: K
authors.initials: K
authors.lastname: Di
authors.forename: H S
authors.initials: HS
authors.lastname: Lim
authors.forename: V L
authors.initials: VL
authors.lastname: Zhang
authors.forename: M H
authors.initials: MH
authors.lastname: Kuok
authors.forename: S C
authors.initials: SC
authors.lastname: Ng
authors.forename: M G
authors.initials: MG
authors.lastname: Cottam
authors.forename: H T
authors.initials: HT
authors.lastname: Nguyen