title: Twenty (forward looking) questions.
authors.affiliation: Oklahoma University Health Sciences Center, Oklahoma City, OK, USA.
authors.forename: Lewis A
authors.initials: LA
authors.lastname: Hassell
authors.affiliation: Department of Laboratory Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA.
authors.forename: Elizabeth A
authors.initials: EA
authors.lastname: Wagar