Lower P1NP serum levels: A predictive marker of bone loss after 1 year follow-up in premenopausal systemic lupus erythematosus patients - Seguro, L. P. C.; Casella, C. B.; Caparbo, V. F.; Oliveira, R. M.; Bonfa, A.; Pereira, Rosa M. R. (Osteoporosis international, 2015)