Sentence 1: Rituximab was investigated and approved by the FDA in April 2011 , when used in combination with glucocorticoids in adult patients .
Sentence 2: Rituximab has been investigated , and in April 2011 approved by the FDA when used in combination with glucocorticoids in adult patients .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?