Original sentence: Both members of Diesel's original rhythm section died from heart attacks within one week: Frank Papendrecht on 18 November 2009 at age 56, and Pim Koopman on 23 November 2009, also at age 56
Edited sentence: Both members of Diesel's original rhythm section died from heart attacks within a few days of each other–Frank Papendrecht on 18 November 2009 at age 56, and Pim Koopman on 23 November 2009, also at age 56