Pratap, D V SReddy, Sivarami KRani, Sudha CKrishna, Venkata AIndira, D2009-05-282009-05-282004-07-24Pratap DV, Reddy SK, Rani SC, Krishna VA, Indira D. ANA-negative systemic lupus erythematosus. Indian Journal of Dermatology, Venereology and Leprology. 2004 Jul-Aug; 70(4): 243-4http://imsear.searo.who.int/handle/123456789/52988engLetter