1 Division of Rheumatology, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico.
2 Universidad Central del Caribe School of Medicine, Bayamón, Puerto Rico.
3 Department of Biology, University of Puerto Rico, Río Piedras Campus, San Juan, Puerto Rico.
4 Department of Biology, University of Puerto Rico, Río Piedras Campus, San Juan, Puerto Rico;Department of Biological Sciences, Oakland University, Rochester, Michigan, USA.