allow specifying comma-separated list of header names
allow specifying comma-separated list of header names

percyliang/fig,ppasupat/fig,percyliang/fig,percyliang/fig,ppasupat/fig,percyliang/fig,percyliang/fig,ppasupat/fig,ppasupat/fig,percyliang/fig,ppasupat/fig,ppasupat/fig