Etherington J, Keeling J, Bramley R, Swaminathan R, McCurdie I, Spector TD. The effects of 10 weeks military training on heel ultrasound and bone turnover. Calcif Tissue Int 1999;64(5):389-93. 

George GH, MacGregor AJ, Spector TD. Influence of current and past hormone replacement therapy on bone mineral density: a study of discordant postmenopausal twins. Osteoporos Int 1999;9(2):158-62. 

Grainger DJ, Percival J, Chiano M, Spector TD. The role of serum TGF-beta isoforms as potential markers of osteoporosis. Osteoporos Int 1999;9(5):398-404. 

Grainger DJ, Heathcote K, Chiano M, Snieder H, Kemp PR, Metcalfe JC, Carter ND, Spector TD. Genetic control of the circulating concentration of transforming growth factor type beta1. Hum Mol Genet 1999;8(1):93-7. 

Hart DJ, Doyle DV, Spector TD. Incidence and risk factors for radiographic knee osteoarthritis in middle-aged women: the Chingford Study. Arthritis Rheum 1999;42(1):17-24. 

Kanis JA, McCloskey EV, Powles T, Paterson AH, Ashley S, Spector T. A high incidence of vertebral fracture in women with breast cancer. Br J Cancer 1999;79(7-8):1179-81.

Keen RW, Woodford-Richens KL, Grant SF, Ralston SH, Lanchbury JS, Spector TD. Association of polymorphism at the type I collagen (COL1A1) locus with reduced bone mineral density, increased fracture risk, and increased collagen turnover. Arthritis Rheum 1999;42(2):285-90. 

Keen RW, Hart DJ, Arden NK, Doyle DV, Spector TD. Family history of appendicular fracture and risk of osteoporosis: a population-based study. Osteoporos Int 1999;10(2):161-6. 

Lloyd ME, Hunt S, Spector TD. Imaging of pelvic fracture in a patient with psoriatic arthritis [letter]. Rheumatology (Oxford) 1999;38(9):902-4. 

Macdonald A, Chatrath P, Spector T, Ellis H. Level of termination of he spinal cord and the dural sac: a magnetic resonance study. Clin Anat 1999;12(3):149-52 [PubMed].

MacGregor AJ, Spector TD. Twins and the genetic architecture of osteoarthritis [editorial]. Rheumatology (Oxford) 1999;38(7):583-8 [PubMed].

Poulter NR, Chang CL, MacGregor AJ, Snieder H, Spector TD. Association between birth weight and adult blood pressure in twins: historical cohort study [see comments]. BMJ 1999;319(7221):1330-3 [PubMed].

Samaras K, Kelly PJ, Chiano MN, Spector TD, Campbell LV. Genetic and environmental influences on total-body and central abdominal fat: the effect of physical activity in female twins [see comments]. Ann Intern Med 1999;130(11):873-82. 

Sambrook PN, MacGregor AJ, Spector TD. Genetic influences on cervical and lumbar disc degeneration: a magnetic resonance imaging study in twins. Arthritis Rheum 1999;42(2):366-72. 

Snieder H, Boomsma DI, van Doornen LJ, Neale MC. Bivariate genetic analysis of fasting insulin and glucose levels. Genet Epidemiol 1999;16(4):426-46.

Snieder H, van Doornen LJ, Boomsma DI. Dissecting the genetic architecture of lipids, lipoproteins, and apolipoproteins: lessons from twin studies. Arterioscler Thromb Vasc Biol 1999;19(12):2826-34 [PubMed].

Snieder H, Hayward CS, Perks U, Kelly RP, Kely PJ, Spector TD. Heritability of central systolic pressure augmentation. A twin study. Hypertension 1999. 

Spector TD, Snieder H, Keen R, Lewis C, MacGregor A. Interpreting the results of a segregation analysis of generalized radiographic osteoarthritis: comment on the article by Felson et al [letter; comment]. Arthritis Rheum 1999;42(5):1068-70.