Complex sentence: Early isolates of "H. duboisii" were thought to be "H. capsulatum" as no cultural differences were seen except for its larger yeast cells, as noted by J. T. Duncan in 1943 and Catanei and Kervan in 1947.
Split into simpler sentences: Early isolates of "H. duboisii" were thought to be "H. capsulatum" as no cultural differences were seen except for its larger yeast cells. This was noted by J. T. Duncan in 1943 and Catanei and Kervan in 1947.