function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akiyama, Tadashi', 5],
    ['Alberico, Natalia & Mühlenhardt-Siegel, Ute', 2],
    ['Alberico, Natalia A. & Roccatagliata, Daniel', 2],
    ['Băcescu, Mihai', 2],
    ['Gamô, Sigeo', 3],
    ['Gerken, Sarah', 59],
    ['Gerken, Sarah & Lörz, Anne-Nina', 2],
    ['Jarquín-González, Jani & García-Madrigal, María Del Socorro', 15],
    ['Kim, Sung-Hyun & Lee, Chang-Mok', 2],
    ['Kim, Sung-Hyun & Lee, Taekjun', 2],
    ['Mühlenhardt-Siegel, Ute', 10],
    ['Mühlenhardt-Siegel, Ute & Lavrenteva, Anna V.', 5],
    ['Shalla, Salma H. & Bishop, John D. D.', 2],
    ['Vassilenko, Stella & Tzareva, Ludmila', 2],
    ['Vink, Willem (Willen)', 2],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=120)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);