sheaths were predominant

Disclaimer. Morningstar: 2016 Morningstar, Inc. Factset: FactSet Research Systems Inc. Images were then imported into ImageJ (Rasband, 2004), and each structure was outlined using a Wacom Intuos4 Pen tablet (Vancouver, WA, USA). The surface area of each outlined structure was calculated using the area analysis tool in ImageJ, and counted toward the total percentage area[…]