Spanish Validation and Scoring of the Internet Gaming Disorder Scale - Short-Form (IGDS9-SF). - Sánchez-Iglesias, Iván; Bernaldo-de-Quirós, Mónica; Labrador, Francisco J.; Estupiñá Puig, Francisco J.; Labrador, Marta; Fernández-Arias, Ignacio (Spanish Journal of Psychology, 2020)