Explanation for binary files inside source package according to
  http://lists.debian.org/debian-devel/2013/09/msg00332.html

Files: data/rtPCR.rda
Documentation: man/rtPCR.Rd
  ->  rtPCR data for experiments investigating a variety of markers for
  characterizing teratogenicity.

 -- Dirk Eddelbuettel <edd@debian.org>  Mon, 04 Jun 2018 06:54:29 -0500
