\description{results from 22 trials examining the effectiveness of intravenous magnesium in the prevention of death following acute myocardial infarction.}
the dataset includes the results from 22 randomized clinical trials that examined the effectiveness of intravenous magnesium in the prevention of death following acute myocardial infarction. it is similar to the dataset \code{\link{dat.egger2001}}, with some slight differences in the included trials and data used.
li, j., zhang, q., zhang, m., & egger, m. (2007). intravenous magnesium for acute myocardial infarction. \emph{cochrane database of systematic reviews}, \bold{2}, cd002755. \verb{https://doi.org/10.1002/14651858.cd002755.pub2}
res <- rma(measure="or", ai=ai, n1i=n1i, ci=ci, n2i=n2i, data=dat, method="ee", subset=-14)
res <- rma(measure="or", ai=ai, n1i=n1i, ci=ci, n2i=n2i, data=dat, method="ee")
medicine, cardiology, odds ratios, publication bias

\title{studies on the association between maternal size, offspring size, and number of offsprings}
\description{results from studies examining the association between maternal size, offspring size, and number of offsprings.}
the object is a list containing data frames \code{m_o_size}, \code{m_o_fecundity}, \code{o_o_unadj}, and \code{o_o_adj} that contain the following columns and the corresponding phylogenetic trees called \code{m_o_size_tree}, \code{m_o_fecundity_tree}, \code{o_o_unadj_tree}, and \code{o_o_adj_tree}:
\bold{article}     \tab \code{numeric}   \tab article id \cr
\bold{author}      \tab \code{character} \tab study author(s) \cr
\bold{species}     \tab \code{character} \tab species \cr
\bold{amniotes}    \tab \code{character} \tab whether the species was amniotic \cr
\bold{environment} \tab \code{character} \tab whether the species were wild or captive \cr
\bold{reprounit}   \tab \code{character} \tab whether the data were based on lifetime reproductive output or a single reproductive event (only in \code{m_o_size} and \code{m_o_fecundity}) \cr
\bold{ri}          \tab \code{numeric}   \tab correlation coefficient \cr
\bold{ni}          \tab \code{numeric}   \tab sample size
the object \code{dat.lim2014} includes 4 datasets:
\code{m_o_size}      \tab on the correlation between maternal size and offspring size \cr
\code{m_o_fecundity} \tab on the correlation between maternal size and number of offsprings \cr
\code{o_o_unadj}     \tab on the correlation between offspring size and number of offsprings \cr
\code{o_o_adj}       \tab on the correlation between offspring size and number of offsprings adjusted for maternal size
objects \code{m_o_size_tree}, \code{m_o_fecundity_tree}, \code{o_o_unadj_tree}, and \code{o_o_adj_tree} are the corresponding phylogenetic trees for the species included in each of these datasets.
lim, j. n., senior, a. m., & nakagawa, s. (2014). heterogeneity in individual quality and reproductive trade-offs within species. \emph{evolution}, \bold{68}(8), 2306--2318. \verb{https://doi.org/10.1111/evo.12446}
cinar, o., nakagawa, s., & viechtbauer, w. (in press). phylogenetic multilevel meta-analysis: a simulation study on the importance of modelling the phylogeny. \emph{methods in ecology and evolution}. \verb{https://doi.org/10.1111/2041-210x.13760}
hadfield, j. d., & nakagawa, s. (2010). general quantitative genetic methods for comparative biology: phylogenies, taxonomies and multi-trait models for continuous and categorical characters. \emph{journal of evolutionary biology}, \bold{23}(3), 494--508. \verb{https://doi.org/10.1111/j.1420-9101.2009.01915.x}
nakagawa, s., & santos, e. s. a. (2012). methodological issues and advances in biological meta-analysis. \emph{evolutionary ecology}, \bold{26}(5), 1253--1274. \verb{https://doi.org/10.1007/s10682-012-9555-5}
### compute phylogenetic correlation matrix
### fit multilevel phylogenetic meta-analytic model
random = list(~ 1 | article, ~ 1 | esid, ~ 1 | species, ~ 1 | species.phy),
ecology, evolution, correlation coefficients, multilevel models, phylogeny