diff --git a/ICsolvers/N803_single.m b/ICsolvers/N803_single.m
index 5b1052e..9740007 100644
--- a/ICsolvers/N803_single.m
+++ b/ICsolvers/N803_single.m
@@ -1,7 +1,7 @@
 %% N803_single.m - solves model for 1 cohort
 %
 %     /--------------------------------------------------------------\
-%     | Date:         06/27/2022                                     |
+%     | Date:         06/29/2022                                     |
 %     | Author:       Jonathan Cody                                  |
 %     | Affiliation:  Purdue University                              |
 %     |               Weldon School of Biomedical Engineering        |
@@ -33,7 +33,10 @@
 %	OPTIONS
 %  ========================================================================
 %
-% varargin = cell vector used to add optional inputs (see 'N803_model_2')
+% All additional inputs will be passed as a cell vector to 'N803_model_2'
+% and used to define options (see function for list)
+% EX: N803_single(SoluTimes,DoseTimes,AllPars,'AbsTol',1e-2} 
+%     will set ode solver absolute tolerance to 1e-2
 %
 %% ========================================================================
 %	OUTPUTS
@@ -188,7 +191,7 @@
 Yic = [ Vi E0 E B0 B 0 0 1 1 ] ;
 
 if any( [ Yic aE0 aB0 p0 gE0 gB0 sE sB ] < 0 )
-	error('Negative parameters or initial values.')
+    error('Negative parameters or initial values.')
 end
 
 Y_OUT = N803_model_2(SoluTimes,DoseTimes,Pars,Yic,varargin) ;