Complex sentence: Stone has low-pitched husky voice is a result of having baby colic, a condition of chronic crying as an infant, resulting in the development of nodules, and as an adult she has calluses on her vocal cords.
Split into simpler sentences: Stone has low-pitched husky voice, which is a result of having baby colic, a condition of chronic crying as an infant. This resulted in the development of nodules, and as an adult she has calluses on her vocal cords.