Complex sentence: In 1999 he became a junior faculty member at Scripps, where he developed a tumor model to study immunotherapeutic approaches in a deadly malignancy in childhood called neuroblastoma.
Split into simpler sentences: In 1999 he became a junior faculty member at Scripps. At Scripps, he developed a tumor model to study immunotherapeutic approaches in a deadly malignancy in childhood called neuroblastoma.