Correction: Key Variables for Effective eHealth Designs for Individuals With and Without Mental Health Disorders: 2^12-4 Fractional Factorial Experiment - Armando J Rotondi; Jonathan Grady; Barbara H Hanusa; Gretchen L Haas; Michael R Spring; Kaleab Z Abebe; James Luther; John Gurklis (Journal of Medical Internet Research, 2021)