Complex sentence: Botulin toxin has been used in CP treatment for around two decades, recommended for children above the age of two, and dosages have been based on expert opinion rather than evidence-based practices.
Split into simpler sentences: Botulin toxin has been used in CP treatment for around two decades and can be recommended for children above the age of two. Dosages of botulin toxin have been based on expert opinion rather than evidence-based practices.