Control sample	Reagent	Mean INR, Operator #1	Mean INR, Operator #2	Mean INR Operator #3	Mean INR, Operator #4	Mean INR, Operator #5	Mean INR, Operator #6	Between‐operator CV (%)
Level 2	RBT/16	2.57	2.62	2.64	2.61	2.47	2.34	4.6
Level 2	rTF/16	2.85	2.80	2.70	2.65	2.51	2.55	5.1