Limitations of this study include possible unmeasured confounding and lack of data concerning cryptorchidism, which is another potential cause of infertility and testicular cancer.

这项研究的限制包括可能未评量的干扰因素，以及缺乏有关隐睾症相关的数据，这是另一个造成不孕症与睾丸癌的潜在原因。

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Another concerning flaw in the study's methodology was that it did not address cordless phone usage, which has been found in other studies to have a risk of tumors similar to cell phones, said Lloyd Morgan, a retired engineer and consumer advocate who has published several analyses on the phone-cancer issue.

CNN: Study fails to end debate on cancer, cell phone link