Because of the varying requirements for trial registration around the world, many multinational, multicentretrials are registered in more than one registry.
由于全球试验注册的要求不同，许多跨国跨中心试验在多个注册中心注册。
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But in China, large scale, multicentre clinical trials are really rare, so can you give us the benefit of your experience and perhaps some of your advice on that issue?