Dear Authors,

I have a minor technical comment and a suggestion:

In l. 46 and l. 57 "The current version of DERMA" is somewhat ambiguous. It may refer to the version that was current at the time this work started and that was superseded by developments described in this work, or to the new version that replaces the "old one". In any case, please use version numbers and refer to those in an unambiguous way. Presumably there should be a number for the version you started working with and a different number for the version that resulted from your improvements. Notice also that GMD encourages the use of version numbers, although these are mandatory in the title only for model description papers.
Same happens in l. 83 - 86. What was current before is no longer current and the new should now be current (untul next update at least).

In l. 167 and l. 170 (Eq. 10)
Whilst \tau is used for the surface shear stress, \tau-based symbols have already been used above for normalised time variables in the Gifford formulation.
You could use a different symbol such as \tau_0 and clarify explicitly the difference in the new context.

l. 87: Equation (1) should be Equation 1

The editor