Just three weeks after the Japanese government declared there was no link between the flu pill and unusual behavior in teens - such as jumping off balconies - the Health, Labor and Welfare Ministry says it will review its findings after errors came to light in the processing of data in the original study, The Daily Yomiuri reports.

The Pharmaceutical Affairs and Food Sanitation Council initially announced last month that it had not found any clear causal relationship between the drug and abnormal behavior, and the council was scheduled to hold a session on Friday to lift a ban on the use of Roche’s Tamiflu by teens after studying a series of studies by other bodies as well as its own.

But after the eleventh-hour discovery of flaws in the processing of the research data, the panel’s next session has been postponed until next month or later, the paper reports. The large analysis, involving data collected from 10,000 flu patients aged up to 18, had been conducted by the panel, which is headed by Professor Yoshio Hirota of Osaka City University, who led the research.

During last weekend’s meeting of the research panel, a private company commissioned by the ministry to tally the data reported that some of the data had been erroneously processed - times when fevers were recorded and initial medical examination results had been mistakenly filed in incorrect categories.