SEARCH Articles Figures Tables Data for a hypothetical calibration curve [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint] [Publishers Imprint]