Andres E, Serraj K (2012) Optimal management of pernicious anaemia. J Blood Med 3: 97–103

Berenson Abbey AB, Rahman M (2012) Effect of hormonal contraceptives on vitamin B12 level and the association of the latter with bone mineral density. Contraception 86(5): 481–7

British Society for Haematology (2014) Diagnosis of B12 and folate deficiency. Available online: https://b-s-h.org.uk/guidelines/guidelines/diagnosis-ofb12-and-folate-deficiency (accessed 9 December, 2019)

Butler CC, Vidal-Alaball J C, Cannings-John R, et al (2006) Oral vitamin B12 versus intramuscular vitamin B12 for vitamin B12 deficiency: a systematic review of randomised control trials. Family Practice 23(3): 279–85

Chan C, Low L, Lee K (2016) Oral vitamin B12 replacement for the treatment of pernicious anaemia. Front Med 3: 38

Devalia V, Hamilton M, Molloy A (2014) Guidelines for the diagnosis and treatment of cobalamin and folate disorders. Br J Haematol 166(4): 496–513

Gilbert L (2017) Diagnosis and treatment of pernicious anaemia. Practice Nurse 47(4): 20–3

Hopper M, Hudson P, Porter F, McCaddon A (2014) Patient journeys: diagnosis and treatment of pernicious anaemia. Br J Nurs 23(7): 376–81

Murphy G, Sanford D, Engels E, et al (2015) Cancer risk following pernicious anemia in the US elderly population. Clin Gastroenterol Hepatol 13(12): 2282–89

National Diet and Nutrition Survey (2016) Results from Years 5 and 6 (combined) of the Rolling Programme (2012/2013– 2012/2014). Available online: www.gov.uk/government/uploads/system/uploads/attachment_data/file/551352/NDNS_Y5_6_UK_Main_Text.pdf

National Institute for Health and Care Excellence (2019) Anaemia — B12 and folate deficiency. NICE, London. Available online: https://cks.nice.org.uk/anaemiab12-and-folate-deficiency

Nyholm E ,Turpin P, Swain D, Cunningham B, Daly S, Nightingale P, Fegan C (2003) Oral vitamin B12 can change our practice. Postgrad Med J 79: 218–20

Royal United Hospital Bath (2019) Guidelines for the investigation and management of vitamin B12 deficiency. Available online: www.ruh.nhs.uk/For_Clinicians/departments_ruh/Pathology/documents/haematology/B12_-_advice_on_ investigation_management.pdf

Seage CH, Glover E, Mercer J (2019) Receiving a diagnosis of pernicious anemia: exploring experiences of relationships with health professionals. J Patient Experience, p.2374373519883497. DOI: 10.1177/2374373519883497

Vidal-Alaball J, Butler C, Potter C (2006) Comparing costs of intramuscular and oral vitamin B12 administration in primary care: a cost-minimization analysis. Eur J Gen Pract 12(4): 169–73

Zdilla MJ (2015) Metformin with either histamine H2-receptor antagonists or proton pump inhibitors: a polypharmacy recipe for neuropathy via B12 depletion. Clin Diabetes 33(2): 90–5