I do trust Hovorka's work, although I have found 1 incorrect number so far, and due to formatting there are two typographical errors. One variable I believe is defined in a way that is a typo. It's supposed to be i_sub_f, when it's like defined as i_sub_f_2 and is not defined anywhere else. It looks suspicious when I relate the equations. Of course, I don't know how it's derived so I have to email the author. Also, a variable for the random walks is not defined, and I believe they meant to but defined epsilon_sub_i twice instead of epsilon_sub_m . That's why I try to be diligent about things.