Abstract:BACKGROUND
Voice messages have been employed as the effective and efficient means for increasing health service utilizations and health promotion in low- and middle-income countries. Yet, unlike SMS, voice message services require their users to pick up a phone call at the time of its delivery. Furthermore, voice messages are difficult for the users to review their contents afterwards. While recognizing that voice messages are more friendly to specific groups (eg, illiterate or less lit… Show more
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