Complex sentence: In 1958 the University launched the Baby Tooth Survey, led by Dr. Louise Reiss and with funding from the Greater St. Louis Citizen's Committee for Nuclear Information (CNI), which studied strontium-90 absorption of children by examining their deciduous teeth.
Split into simpler sentences: In 1958 the University launched The Baby Tooth Survey with funding from the Greater St. Louis Citizen's Committee for Nuclear Information (CNI). The Baby Tooth Survey studied strontium ‐ 90 absorption of children by examining their deciduous teeth.