Time commitment, adds Smyth, is one of the main barriers.
Short-term thinking was considered one of the main barriers to successful reform.
One of the main barriers to an open discussion is the system of representation.
One of the main barriers for South Africa to maintain and grow its Aids programme is financial, he said.
The main barriers to small businesses taking on Environmental Management System EMSS) accreditation are usually cost, time and expertise.
Further DWP research shows that one of the main barriers to attending work-focused interviews is mental ill health (pdf).
One of the main barriers to women's agricultural output, the report found, is their inability to mobilise extra labour.
Today the main barriers to further progress toward gender equity no longer lie in people's personal attitudes and relationships.
I don't mean to suggest that judges and justices have been the main barriers to clearing out Guantánamo.
Outside the United States, tariffs at that time were not even the main barriers to international commerce.
One of the main barriers to carrier payments are lofty carrier rates.
