Puente D, Zabaleta-Del-Olmo E, Pueyo MJ, Salto E, Marsal JR, Bolibar B. Cigarette smoking prevalence and associated factors in secondary school children in Catalunya. Aten Primaria. 2013 Jun;45(6):315-23. doi: 10.1016/j.aprim.2012.12.007
Petri M, Perez-Gutthann S, Spence D, Hochberg MC. Risk factors for coronary artery disease in patients with systemic lupus erythematosus. Am J Med. 1992 Nov 1;93(5):513-9.
Petri M, Perez-Gutthann S, Longenecker JC, Hochberg M. Morbidity of systemic lupus erythematosus: role of race and socioeconomic status. Am J Med. 1991 Oct 1;91(4):345-53.