checkRd: (-1) convert_units.Rd:72: Lost braces in \itemize; meant \describe ?
checkRd: (-1) convert_units.Rd:73: Lost braces in \itemize; meant \describe ?
checkRd: (-1) convert_units.Rd:74: Lost braces in \itemize; meant \describe ?
checkRd: (-1) httk-package.Rd:15-16: Lost braces
    15 | \doi{10.1080/17425255.2021.1935867}{Breen et al. (2021): High-throughput 
       |                                    ^
checkRd: (-1) httk-package.Rd:18-19: Lost braces
    18 | \doi{10.18637/jss.v079.i04}{Pearce et al. (2017): httk: R
       |                            ^
checkRd: (-1) httk-package.Rd:21-23: Lost braces
    21 | \doi{10.1021/es501955g}{Armitage et al. (2014): Application of mass balance 
       |                        ^
checkRd: (-1) httk-package.Rd:25-27: Lost braces
    25 | \doi{10.1093/toxsci/kfv171}{Incorporating High-Throughput Exposure 
       |                            ^
checkRd: (-1) httk-package.Rd:29-30: Lost braces
    29 | \doi{10.1093/toxsci/kfv118}{Wambaugh et al. (2015):
       |                            ^
checkRd: (-1) httk-package.Rd:32-34: Lost braces
    32 | \doi{10.1007/s10928-017-9548-7}{Pearce et al. (2017):
       |                                ^
checkRd: (-1) httk-package.Rd:36-38: Lost braces
    36 | \doi{10.1016/j.envint.2017.06.004}{Ring et al. (2017):
       |                                   ^
checkRd: (-1) httk-package.Rd:40-42: Lost braces
    40 | \doi{10.1021/acs.est.7b00650}{Sipes et al. (2017): An
       |                              ^
checkRd: (-1) httk-package.Rd:44-45: Lost braces
    44 | \doi{10.1093/toxsci/kfy020}{Wambaugh et al. (2018):
       |                            ^
checkRd: (-1) httk-package.Rd:47-49: Lost braces
    47 | \doi{10.1371/journal.pone.0217564}{Honda et al. (2019):
       |                                   ^
checkRd: (-1) httk-package.Rd:51-52: Lost braces
    51 | \doi{10.1093/toxsci/kfz205}{Wambaugh et al. (2019):
       |                            ^
checkRd: (-1) httk-package.Rd:54-56: Lost braces
    54 | \doi{10.1038/s41370-020-0238-y}{Linakis et al. (2020):
       |                                ^
checkRd: (-1) tissue_scale.Rd:21: Lost braces; missing escapes or markup?
    21 | Allometrically scale a tissue mass or flow based on height^{3/4}.
       |                                                            ^