function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Denis Geraards', 1],
    ['Don E. Wilson & Russell A. Mittermeier', 3],
    ['Geraads, Denis', 6],
    ['Geraads, Denis & Spassov, Nikolaï & Hristova, Latinka', 2],
    ['Gray, John Edward', 1],
    ['Güleç, Erksin Savaş & Sevim, Ayla & Pehlevan, Cesur', 2],
    ['James H. Honacki & Kenneth E. Kinman & James W. Koeppl', 5],
    ['Julian Fenessy & Tobias Bidon & Friederike Reuss & Vikas Kumar', 4],
    ['Kostopoulos, Dimitris S. & Saraç, Gercek', 6],
    ['Kostopoulos, Dimitris S. & Sen, Sevket', 4],
    ['Laskos, Kostantis & Kostopoulos, Dimitris S.', 1],
    ['Peter Grubb', 5],
    ['Petzold, Alice & Magnant, Anne-Sophie & Edderai, David', 13],
    ['Ríos, María & Sánchez, Israel M. & Morales, Jorge', 1],
    ['Wilson, Don E. & Reeder, DeeAnn', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=61)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);