Quick Question: Measuring Dabigatran

This question was a reprise of an earlier question and attracted relatively few votes, however it added “In-house dilute thrombin time,” which turns out to be used by several laboratories.
What assay do you use to measure dabigatran (Pradaxa)?
a. Stago’s ecarin chromogenic assay, 4 (31%)
b. Standard thrombin time, 3 (23%)
c. In-house dilute thrombin time, 3 (23%)
d. Partial thromboplastin time (PTT), 2 (15%)
e. Hyphen’s plasma-diluted thrombin time, 1(8%)