Many suggested that the private sector could ‘cherry pick' the most lucrative services, to leave the NHS funding costly, unprofitable treatments.
A total of 609 responses were gained for the survey for the journal Management in Practice.
Nearly 65 per cent believed practice-based commissioning had so far had no effect upon the quality of patient care.
A total of 93 per cent said that the new GMS contract had increased their workloads, with 45 per cent saying that their morale was worse since the contract was introduced.
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