Table 2. Search string.

Category	MeSH	Keywords (in title or abstract)
Health	“Health” OR “Delivery of Health Care”	health OR patient* OR wellbeing OR well-being OR healthcare
Recommendation system	No relevant MeSH terms identified	“recommendation system” OR “recommendation systems” OR “recommender system” OR “recommender systems” OR recommender OR “recommendation service” OR personaliz* OR personalis*
Digital	“Algorithms” OR “Telemedicine” OR “Mobile Applications”	Digital OR algorithm OR “artificial intelligence” OR “machine learning” OR ai OR online OR web-based OR internet-based OR app OR apps OR mhealth OR “mobile application*” OR “smartphone application*” OR “iphone application*”
Effectiveness	No relevant MeSH terms identified	Effective OR effectiveness OR improve* OR evaluat* OR efficacy OR accuracy OR accurate

^*Refers to the symbol commonly used by databases to indicate truncation or ‘wildcard’ searching, which has been used to indicate a search of all variants of the mentioned terms.