[1
]
Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry, Universidad
de La Frontera, Temuco, Chile.
[2
]
Center for Research in Epidemiology, Economics and Oral Public Health (CIEESPO), Faculty
of Dentistry, Universidad de La Frontera, Temuco, Chile.
[3
]
Universitat Autònoma de Barcelona, Barcelona, Spain.
[4
]
Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB Sant Pau),
Barcelona, Spain.
[5
]
CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain.
[6
]
Faculty of Dentistry, Universidad San Sebastian, Puerto Montt, Chile.
[7
]
Health Services Research Group, IMIM (Hospital del Mar Medical Research Institute),
Barcelona, Spain.