共 41 条
[1]
Clinical manifestations, risk factors, and maternal and perinatal outcomes of coronavirus disease 2019 in pregnancy: living systematic review and meta-analysis
[J].
BMJ-BRITISH MEDICAL JOURNAL,
2020, 370
[2]
Bakouei F., 2020, SSRN ELECT J, P1, DOI [10.2139/ssrn.3634840, DOI 10.2139/SSRN.3634840]
[3]
BBC Midlands, 2021, BBC
[5]
Braun V., 2012, APA HDB RES METHODS, V2, P57, DOI [DOI 10.1037/13620-004, 10.1007/978-981-10-2779-6_103-1, 10.1007/978-981-10-5251-4103, DOI 10.1007/978-981-10-5251-4103, 10.1080/17439760.2016.1262613, DOI 10.1007/978-981-10-2779-6103-1]
[6]
Braun V., 2006, QUAL RES PSYCHOL, V3, P77, DOI DOI 10.1191/1478088706QP063OA