fix: ensure all values are coded as strings
fix: ensure all values are coded as strings

fprados/nipype,gerddie/nipype,dmordom/nipype,mick-d/nipype_source,grlee77/nipype,glatard/nipype,carlohamalainen/nipype,carolFrohlich/nipype,dgellis90/nipype,gerddie/nipype,carolFrohlich/nipype,wanderine/nipype,dgellis90/nipype,rameshvs/nipype,carlohamalainen/nipype,carolFrohlich/nipype,wanderine/nipype,Leoniela/nipype,grlee77/nipype,Leoniela/nipype,Leoniela/nipype,wanderine/nipype,arokem/nipype,blakedewey/nipype,mick-d/nipype,grlee77/nipype,FCP-INDI/nipype,FCP-INDI/nipype,JohnGriffiths/nipype,FredLoney/nipype,pearsonlab/nipype,grlee77/nipype,arokem/nipype,blakedewey/nipype,wanderine/nipype,JohnGriffiths/nipype,arokem/nipype,FredLoney/nipype,carlohamalainen/nipype,blakedewey/nipype,dmordom/nipype,gerddie/nipype,glatard/nipype,FredLoney/nipype,pearsonlab/nipype,mick-d/nipype,carolFrohlich/nipype,glatard/nipype,iglpdc/nipype,fprados/nipype,sgiavasis/nipype,pearsonlab/nipype,mick-d/nipype,glatard/nipype,rameshvs/nipype,dgellis90/nipype,mick-d/nipype_source,mick-d/nipype_source,FCP-INDI/nipype,JohnGriffiths/nipype,iglpdc/nipype,pearsonlab/nipype,FCP-INDI/nipype,iglpdc/nipype,sgiavasis/nipype,gerddie/nipype,JohnGriffiths/nipype,rameshvs/nipype,rameshvs/nipype,iglpdc/nipype,arokem/nipype,sgiavasis/nipype,blakedewey/nipype,sgiavasis/nipype,fprados/nipype,mick-d/nipype,dmordom/nipype,dgellis90/nipype