% unlike in latex, new lines within \newcommand end the command (even using %)

\newcommand{\Butler2000}{Butler, M. A., T. W. Schoener, and J. B. Losos. 2000.  The relationship between sexual size dimorphism and habitat use in Greater Antillean Anolis lizards.  Evolution, 54:259--272. \doi{10.1111/j.0014-3820.2000.tb00026.x}.}

\newcommand{\Hansen1997}{T.F. Hansen. 1997. Stabilizing selection and the comparative analysis of adaptation. Evolution, 51:1341--1351. \doi{10.1111/j.1558-5646.1997.tb01457.x}.}

\newcommand{\Williams1972}{Williams, E. E. 1972.  The origin of faunas. Evolution of lizard congeners in a complex island fauna: a trial analysis.  Evolutionary Biology, 6:47--89. \doi{10.1007/978-1-4684-9063-3_3}.}

\newcommand{\Butler2004}{Butler, M.A. and A.A. King. 2004.  Phylogenetic comparative analysis: a modeling approach for adaptive evolution.  American Naturalist 164:683--695. \doi{10.1086/426002}.}

\newcommand{\Lazell1972}{Lazell, J. D. 1972.  The anoles (Sauria: Iguanidae) of the Lesser Antilles.  Bull. Mus. Comp. Zool., 143:1--115.}

\newcommand{\Losos1990}{Losos, J. B. 1990.  A phylogenetic analysis of character displacement in Caribbean Anolis lizards.  Evolution, 44:558--569. \doi{10.1111/j.1558-5646.1990.tb05938.x}.}

\newcommand{\Cressler2015}{Cressler, C. E., Butler, M. A., and King, A. A. 2015. Detecting adaptive evolution in phylogenetic comparative analysis using the Ornstein-Uhlenbeck model. Systematic Biology, 64:953--968. \doi{10.1093/sysbio/syv043}.}
