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Table 1 Schedule of health messages in the WhatsApp Messenger App

From: Efficacy of a facial-aging web app on sun protection behaviors among primary school students in Iran: a randomized controlled trial

Days of the Week

Time

PMT constructs

Messages Number

Saturday

10 am to 4 pm

Perceived Susceptibility and Perceived Severity

4

Sunday

10 am to 4 pm

Fear

2

Monday

10 am to 4 pm

Self-Efficacy, Response Cost, and Perceived Response Efficacy

4

Tuesday

10 am to 4 pm

Self-Efficacy, Response Cost, and Perceived Response Efficacy

4

Wednesday

10 am to 4 pm

Self-Efficacy, Response Cost, and Perceived Response Efficacy

4

Thursday

10 am to 4 pm

Reward

3

Friday

10 am to 4 pm

Protection Motivation

3

Saturday

10 am to 4 pm

Protection Motivation

3