title: A higher degree of difficulty.
authors: Laura L
authors: LL
authors: Kiessling
authors: Jennifer A
authors: JA
authors: Doudna
authors: Kai
authors: K
authors: Johnsson
authors: Anna K
authors: AK
authors: Mapp
authors: Michael A
authors: MA
authors: Marletta
authors: Peter H
authors: PH
authors: Seeberger
authors: James R
authors: JR
authors: Williamson
authors: Sally Garbo
authors: SG
authors: Wedde
mesh_terms: D001208:Asia; D005060:Europe; D006801:Humans; D012106:Research / Q000331:legislation & jurisprudence; D012109:Research Support as Topic / Q000639:trends*; D014481:United States; D000078329:Workforce