Ahmed F, Jones DB & Jackson AA (1990) The interaction of vitamin A deficiency and rotavirus in the mouse. British Journal of Nutrition 63, 363–373.
Alvarez JO, Salazar-Lindo E, Kohatsu J, Miranda P & Stephenson CB (1995) Urinary excretion of retinol in children with acute diarrhoea. American Journal of Clinical Nutrition 61, 1273–1276.
Amedee-Manesme O, Luzeau R, Wittpenn JR, Hanck A & Sommer A (1988) Impression cytology test detects subclinical vitamin A deficiency. American Journal of Clinical Nutrition 50, 814–817.
Bates CJ (1995) Vitamin A. Lancet 345, 31–35.
Biesalski HK (1996) Efficient vitamin A supply through inhalation. Report of the XVII IVACG Meeting, Guatamala City, Guatamala, p. 100. Washington, DC: IVACG Secretariat.
Brewster DR, Manary MJ, Menzies IS, O'Loughlin EV & Henry RL (1997) Intestinal permeability in kwashiorkor. Archives of Disease in Childhood 76, 236–241.
Coutsoudis A, Adhikari M & Coovadia HM (1993) Serum vitamin A concentrations and association with respiratory disease in premature infants. Journal of Tropical Pediatrics 41, 230–233.
Coutsoudis A & Way R (1996) An evaluation of the association between external eye diseases and vitamin A status in black South African children. South African Medical Journal 86, 871–879.
Das BS, Thurnham DI & Das DB (1996) Plasma tocopherol, retinol and carotenoids in children with falciparium malaria. American Journal of Clinical Nutrition 64, 94–100.
Egbert PR, Lauber S & Maurice DM (1977) A simple conjunctival biopsy. American Journal of Opthalmology 84, 798–801.
Elia M, Behrens R, Northrop C, Wraight P & Neale G (1987) Evaluation of mannitol, lactulose and 51-Cr-labelled ethylenediamine tetra acetate as markers of intestinal permeability in man. Clinical Science 73, 197–204.
Fleming SC, Duncan A, Russell RI & Laker MF (1996) Measurement of sugar probes in serum: an alternative to urine measurement in intestinal permeability testing. Clinical Chemistry 42, 445–448.
Gadomski AM, Kjolhede CL, Wittpenn J, Bulux J, Rosas AR & Forman MR (1989) Conjunctival impression cytology (CIC) to detect sub-clinical vitamin A deficiency: comparison of CIC with biochemical assessments. American Journal of Clinical Nutrition 49, 495–500.
Herrera MG, Fawzi WW, Nestel P, El Amin A & Mohamed KA (1996) Effect of vitamin A on the incidence of cough, diarrhoea and fever. Report of the XVII IVACG Meeting, Guatamala City, Guatemala, p. 95. Washington, DC: IVACG Secretariat.
Hubble D & Littlejohn S (1963) D-Xylose excretion test in coeliac disease in childhood. Archives of Disease in Childhood 38, 476–480.
Kessing V (1968) Mucous gland system of the conjunctiva. Acta Ophthalmologica 95, 119–133.
Lamabadusuriya SP, Packer S & Harries JT (1975) Limitations of the xylose tolerance test as a screening procedure in childhood coeliac disease. Archives of Disease in Childhood 50, 34–39.
Lunn PG, Northrop CA & Northrop AJ (1989) Automated enzymatic assays for the determination of intestinal permeability probes in urine. 2. Mannitol. Clinica Chimica Acta 183, 163–170.
McCollum EV & Davis M (1915) The essential factors in the diet during growth. Journal of Biological Chemistry 15, 23.
Meneghetti L, Ceriani T, Maccabelli G, Ferraris P, Gori S & Ventura U (1989) Potential difference and mucus content in the stomach of vitamin A deficient rats. European Journal of Physiology 415, 30 Abstr.
Menzies IS, Laker MF & Pounder RE (1979) Abnormal intestinal permeability to sugars in villous atrophy. Lancet ii, 1107–1109.
Miller KW, Stoltzfus RJ, Hakimi M & Rasmussen KM (1993) Conjunctival impression cytology as an indicator of vitamin A status in lactating Indonesian women. American Journal of Clinical Nutrition 58, 167–173.
Natadiastra G, Wittpenn JR, Muhilal M, West KP Jr., Mele L & Sommer A (1988) Impression cytology a practical index of vitamin A status. American Journal of Clinical Nutrition 48, 695–701.
Nelson JA, Wiley CA, Reynolds-Kohler C, Reese CE, Mergaretten W & Levey JA (1988) Human immunodeficiency virus was detected in bowel epithelium from patients with gastrointestinal symptoms. Lancet i, 259–262.
Northrop CA, Lunn PG & Behrens RH (1990) Automated enzymatic assays for the determination of intestinal permeability probes in urine. 1. Lactulose and lactose. Clinica Chimica Acta 187, 163–170.
Northrop-Clewes CA, Lunn PG & Downes RM (1997) Lactose maldigestion in Gambian infants. Journal of Paediatric Gastroenterology and Nutrition 24, 257–263.
Reddy V, Rao V, Arunjyothi & Reddy M (1989) Conjunctival impression cytology for assessment of vitamin A status. American Journal of Clinical Nutrition 50, 814–817.
Ross AC (1992) Vitamin A status: relationship to immunity and the antibody response. Proceedings of the Society of Experimental and Biological Medicine 200, 303–320.
Shenai JP, Kennedy KA, Chytil F & Stahlman MT (1987) Clinical trial of vitamin A supplementation in infants susceptible to bronchopulmonary dysplasia. Journal of Pediatrics 111, 269–277.
Sommer A, Green WR & Kenyon KR (1982) Bitot's spots responsive and non-responsive to vitamin A. Clinicopathologic correlations. Archives of Ophthalmology 99, 2014–2027.
Tanumihardjo SA & Olsen JA (1991) The reproducibility of the modified relative dose response (MRDR) assay in healthy individuals over time and its comparison with conjunctival impression cytology (CIC). European Journal of Clinical Nutrition 45, 407–411.
Vijayaraghavan K, Radhalah G, Prakasam BS, Sarma KVR & Reddy V (1990) Effect of massive dose of vitamin A on morbidity and mortality of Indian children. Lancet ii, 1342–1345.
World Health Organization (1995) Division of Diarrhoeal and Acute Respiratory Disease Control, Vitamin A Supplementation and Childhood Pneumonia. Geneva: WHO.
Wittpenn JR, Tseng SCG & Sommer A (1986) Detection of early xerophthalmia by impression cytology. Archives of Ophthalmology 104, 237–239.
Wolbach SB & Howe PR (1925) Tissue changes following deprivation of fat-soluble A vitamin. Journal of Experimental Medicine 42, 753–777.
Wolf G (1978) A historical note on the mode of administration of vitamin A for the cure of night-blindness. American Journal of Clinical Nutrition 31, 290–292.
Zile MH, Bunge EC & DeLuca HF (1981) DNA labelling of rat epithelial tissues in vitamin A deficiency. Journal of Nutrition 111, 777–788.