static void UpdateDemographics(Participant p, ParticipantListItemViewModel vm)
        {
            vm.AgeDays = (DateTime.Now - p.DateTimeBirth).Days;

            //to do - inform ageUpdatingService
            vm.DateTimeBirth      = p.DateTimeBirth;
            vm.IsMale             = p.IsMale;
            vm.Name               = p.Name;
            vm.RegisteredAt       = p.RegisteredAt;
            vm.HospitalIdentifier = p.HospitalIdentifier;
            vm.RegisteredAt       = p.RegisteredAt;

            if (vm is ParticipantProgressViewModel sp)
            {
                sp.PhoneNumber     = p.PhoneNumber;
                sp.MothersName     = p.MothersName;
                sp.AdmissionWeight = p.AdmissionWeight;
            }
        }