Original sentence: Baltimore initially refused to retract the paper, although he did so four years later with three co-authors (Imanishi-Kari and Moema H.In the meantime, O'Toole soon dropped her challenge but two scientists at NIH (Health & Human Services (HHS)), Walter W
Edited sentence: Although O'Toole soon dropped her challenge, two scientists at NIH (Health & Human Services (HHS)), Walter W.Baltimore initially refused to retract the paper, although he finally did, four years later with three co-authors (Imanishi-Kari and Moema H