[lemma=however] [tag=","] [□]
[lemma=however] [tag=","] [□=□]
[lemma=however] [tag=","] [□ & □]
However , M + C faces significant challenges that threaten beneficiary choice . From the late 1980s however , gardener Wiert Nieuman began experimenting with recycled , more environmentally-friendly materials . However , ACE and its members had already begun to take more appropriate and ultimately more effective approaches by the time of its September 2000 Annual Meeting , when bioterrorism was the keynote topic . As a result , review of patient records by human experts may be used as a reference standard.1 However , record review can be expensive and time consuming . Normal units for the powder factor are lb / yd3 or kg / m3 ; however , lb / ton and kg / ton are also used as well as the reciprocals of all of these terms .