Asthma	Mental health problems
Autoimmune diseases (e.g. systemic lupus erythematosus)	Haematological disorders (e.g. thalassemia, sickle-cell anaemia, iron deficiency anaemia, and pro-coagulant states)
Known malignancies	Epilepsy
Cardiac problems (congenital and acquired)	Inflammatory disorders and allergic/atopic conditions (e.g. eczema and ulcerative colitis)
Diabetes mellitus (types I or II)	Essential hypertension
Diseases caused by blood-borne viruses (e.g. HIV, hepatitis B and C)	Thrombotic events
Endocrine disorders, excluding diabetes mellitus (e.g. hypothyroidism and hyperthyroidism)	Musculoskeletal disorders (e.g. osteoarthritis and hip replacement)
Renal problems (e.g. pyelonephritis, nephrectomy, and recurrent urinary tract infection)	Other infections, excluding blood-borne viruses (e.g. sexually transmitted infections, tuberculosis, and group–B Streptococcus infection)
Neurological disorders (e.g. migraine)	Treated for infertility