[NTG-context] Chapter-author in TOC

Hi all! I’m using the structureuservariable to set an author on a per chapter basis. But I would also like to have them in the table of contents, so I tried the following: \setuplist[chapter][alternative=MyListItem] \definelistplacement[MyListItem][none]#1#2#3% {#1 #2 (\structureuservariable{author}) #3} \starttext \placelist[chapter] \startchapter[title=Quote from Tufte][author=Tufte] \input tufte \stopchapter \startchapter[title=Quote from Knuth][author=Knuth] \input Knuth \stopchapter \stoptext … without success. I appreciate any help. Greeting Andreas