function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahrens, Dirk', 1],
    ['Ahrens, Dirk & Bezděk, Aleš', 7],
    ['Ahrens, Dirk & Fabrizi, Silvia & Bai, Ming & Liu, Wangang', 61],
    ['Alekseev, Vitalii I.', 1],
    ['Bezděk, Aleš & Hájek, Jiří & Ascr, Biology Centre', 1],
    ['Dupuis, Fabien', 1],
    ['Fabrizi, Silvia & Liu, Wan-Gang & Bai, Ming & Yang, Xing-Ke', 1],
    ['Freese, Edwin L. & Veal, Doug A. & Lago, Paul K.', 7],
    ['Kaneko, Naoki & Wada, Kaoru', 2],
    ['Motschulsky, Victor de', 2],
    ['Ranasinghe, Sasanka & Eberle, Jonas & Benjamin, Suresh P.', 2],
    ['Sreedevi, Kolla & Ranasinghe, Sasankha & Fabrizi, Silvia', 2],
    ['Sreedevi, Kolla & Speer, Jana & Fabrizi, Silvia & Ahrens, Dirk', 4],
    ['Su, Xie & Li, Wei & Liu, Wan-Gang & Ahrens, Dirk', 5],
    ['Zhao, Ming-Zhi & Ahrens, Dirk', 17],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=115)',
    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);