Long COVID demographic and secondary care referral characteristics in primary care: analysis of anonymised primary care data from a multiethnic, deprived urban area in the UK oleh Martin Chapman, Stevo Durbaba, Florence Tydeman, Matt Friend, Laura Duly, Julie Moore, Vasa Curcin, Yanzhong Wang, Caroline J. Jolley, Georgios Kaltsakas, Trudie Chalder, Nicholas Hart, Mark Ashworth