Only 2% of drugs collected in police drug seizures in Denmark were purported to be ecstasy; most were heroin, cocaine or amphetamine. The researchers examined contents of drug seizures in specific, predetermined areas. Samples were collected on an approximately weekly basis from 1995 to 2000, with samples taken from street-level (i.e. from dealers or users), rather than from larger seizures. 39 samples were collected overall. 24 of 39 samples contained MDMA, with dosage varying from 15 to 145 mg. 54 to 75 mg MDE was detected in 2 tablets, and one tablet contained 18 mg MDMA plus 44 mg MDE. MDA (1 sample), MBDB (2 samples, PMA or PMMA (1 sample) were also detected. 19% of ecstasy samples were seized outdoors, 42% were seized in private homes and 22% were seized from cafes, clubs and dance events (referred to as "techno parties.") The authors believe that street-level seizures may underestimate degree of ecstasy use, since most seizures for all drugs (58%) took place outdoors and only 4% took place in cafes, clubs or parties. Ecstasy dosage in Denmark for this 4-year period (1996-2000; no samples collected in 1995) was highly variable, and fake pills were detected, though at a lower rate than seen in samples based on user-submitted samples in other countries (e.g. Baggott et al. 2000). However, this study, like similar assessments of the contents of ecstasy tablets (Baggott et al. 2000; Cole et al. 2002), indicate that dosage varies widely in one area, making it difficult to estimate the dose of a "typical" ecstasy tablet.