This function calculates the innermost intervals (Turnbull's algorithm) for interval-censored data. Right-censored data is not allowed at this point.

1 |

`data` |
A matrix with two columns, consisting of left and right endpoints of the interval data |

`eps` |
A scalar additive value which jitters the data slightly to break ties. |

A 2 column matrix of the left and right endpoints of the innermost intervals.

W.J. Braun

Turnbull (1976) The empirical distribution function with arbitrarily grouped, censored and truncated data. Journal of the Royal Statistical Society Series B, 38: 290-295.

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