Update Evaluation/Input/Content/Section1_Introduction.md

Co-authored-by: Pavel Balazki <[email protected]>

Evaluation/Input/Content/Section1_Introduction.md

@@ -8,7 +8,7 @@ excretion. The absorption of metformin is saturable and reported to be restricte
 intestine ([Vidon 1988](#5-references)). The excretion of metformin is mainly mediated via the sequential action of OCT2 and
 MATE in the kidney, with a moderate contribution of renal glomerular filtration (approximately
 20 %). Metformin is recommended by the FDA as OCT2/MATE victim drug for the use in clinical
-DDI studies and drug labeling [FDA 2017](#5-references).
+DDI studies and drug labeling ([FDA 2017](#5-references)).
 
 The herein presented PBPK model of metformin PBPK model has been developed using 39 clinical studies. The model was evaluated by comparing simulations to observed data of both intravenously and orally administered metformin covering a dosing range from 0.001 to 2550 mg.