title: Reply.
authors.affiliation: McGill University Health Center, Montreal, Quebec, Canada.
authors.forename: T
authors.initials: T
authors.lastname: El Helou
authors.affiliation: McGill University Health Center, Montreal, Quebec, Canada.
authors.forename: K A
authors.initials: KA
authors.lastname: Watters
authors.affiliation: McGill University Health Center, Montreal, Quebec, Canada.
authors.forename: I
authors.initials: I
authors.lastname: Colmegna