2013-02-16 Pushing current version of the log.

HumMod version bumped to 2.0.49. It now seems that there are lots of cells in the renal cortex that can secrete EPO, with the juxtamedullary region the first to act. So what was called proximal tubule pO2 is now extended to tubule O2. Editing is visible at Organs | Kidney | Tubule O2. XML editing is visible at Structure\Kidney\TubuleO2.

Added preglomerular O2 shunting to the kidney. This looks like a very important physiological part of the control of EPO secretion.

HumMod now goes for 1 month on 7672 steps and 2765 retries. BP drifts down to 104/65. Plasma volume expands. But EPO seems well controlled and RBC volume stays flat at around 2380 mL. More to follow ...