1 Department of Chemistry, University of Texas-Pan American, 1201 W. University Dr., Edinburg, TX 78539, United States.
2 Department of Molecular Pathology, University of Texas, M. D. Anderson Cancer Center, 1515 Holcombe Blvd. Houston, TX 77030, 1201 W. University Dr., Edinburg, TX 78539, United States.
3 Community Health System of South Texas, 3135 South Sugar Road, Edinburg, TX 78539, United States.
4 Department of Mathematics and Natural Sciences, College of Sciences and Human Studies, Prince Mohammad Bin Fahd University, Al Khobar, Saudia Arabia.