1. Faculty of Health Sciences University of Eastern Finland Kuopio 70211 Finland
2. Escuela de Química Universidad Industrial de Santander A. A. 678 Bucaramanga Colombia
3. Grupo de Investigación en Compuestos Orgánicos de Interés Medicinal CODEIM Universidad Industrial de Santander A. A. 678 Piedecuesta Colombia
4. Department of Medical Oncology and Pneumology Internal Medicine VIII University Hospital of Tübingen Otfried-Müller-Strasse 14 72076 Tübingen Germany
5. Laboratory of Cancer Drug Resistance Federal University of Paraná PR 80210-170 Curitiba Brazil
6. Laboratory of Cell Biology Center for Cancer Research National Cancer Institute National Institutes of Health Bethesda Maryland USA