Table 1. Results of successively expanding the search string until the time newly identified articles potentially eligible (on abstract review) was around 1% of the total number of articles found by the search.

Search strings	Publications(duplicate removed), n	Publications selectedby two reviewerson title review, n	New publications selectedby two reviewerson abstract review, n	Publications eligible, %
PubMed
Search 1: ((Patients OR Primary Care OR General Practice) AND (COVID OR COVID-19 OR Coronavirus OR SARS-COV-2 OR Pandemic) AND (Video Consult* OR Telephone consult* OR Online Consult*) AND (Barriers OR Facilitators OR Attitudes) AND (Mixed Methods OR Qualitative OR quantitative OR Survey OR Questionnaire OR Interview* OR Focus group* OR Multi Methods))	112	53	25	22.3%
Search 2: ((Patients OR Primary Care OR General Practice OR Family clinician) AND (COVID-19 OR COVID OR Coronavirus OR SARS-COV-2 OR Pandemic) AND (Video Consult* OR Telephone consult* OR Online Consult* OR Telehealth OR Telemedical OR Telecare OR Telemedicine) AND (Barriers OR Facilitators OR Attitudes OR Challenges) AND (Quantitative OR Qualitative OR Mixed Methods OR Survey OR Questionnaire OR Interview* OR Focus group* OR Multi Methods))	599	150	42	7.0%
Search 3: ((Patients OR Primary Care OR General Practice OR Family clinician OR Family Physician*) AND (COVID-19 OR COVID OR Coronavirus OR SARS-COV-2 OR Pandemic) AND (Video Consult* OR Telephone consult* OR Online Consult*OR Telehealth OR Telemedical OR Telecare OR Telemedicine OR Digital Health OR "mHealth" OR Connected Care) AND (Barriers OR Facilitators OR Attitudes OR Challenges OR Factors) AND (Quantitative OR Qualitative OR Mixed Methods OR Survey OR Questionnaire OR Interview* OR Focus group* OR Multi Methods))	879	213	21	2.4%
Search 4: ((Patients OR Primary Care OR General Practice OR Family clinician OR Family Physician* OR General Practitioner) AND (COVID-19 OR COVID OR Coronavirus OR SARS-COV-2 OR Pandemic) AND (Video Consult* OR Telephone consult* OR Online Consult*OR Telehealth OR Telemedical OR Telecare OR Telemedicine OR Digital Health OR "mHealth" OR Connected Care OR Virtual clinic OR Virtual Medicine OR Video visit) AND (Barriers OR Facilitators OR Attitudes OR Challenges OR Factors OR Perceptions) AND (Quantitative OR Qualitative OR Mixed Methods OR Survey OR Questionnaire OR Interview* OR Focus group* OR Multi Methods))	1058	236	12	1.1%
PsyInfo
Search 4: ((Patients OR Primary Care OR General Practice OR Family clinician OR Family Physician* OR General Practitioner) AND (COVID-19 OR COVID OR Coronavirus OR SARS-COV-2 OR Pandemic) AND (Video Consult* OR Telephone consult* OR Online Consult*OR Telehealth OR Telemedical OR Telecare OR Telemedicine OR Digital Health OR "mHealth" OR Connected Care OR Virtual clinic OR Virtual Medicine OR Video visit) AND (Barriers OR Facilitators OR Attitudes OR Challenges OR Factors OR Perceptions) AND (Quantitative OR Qualitative OR Mixed Methods OR Survey OR Questionnaire OR Interview* OR Focus group* OR Multi Methods))	1061	237	0	0.0%