function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Callmander, Martin W. & Durbin, Olivier D. & Lack, Hans-Walter', 1],
    ['Cobo, M. Carmen & Kocot, Kevin M.', 17],
    ['Eisenhut, Angelika & Salvini-Plawen, Luitfried V.', 4],
    ['Gerdes, Klaas & Kihara, Terue Cristina & Martinez Arbizu, Pedro', 2],
    ['Gil-Mansilla, Esther & García-Álvarez, Óscar', 4],
    ['Kocot, Kevin M. & Todt, Christiane', 10],
    ['Ostermair, Lukas & Brandt, Angelika & Haszprunar, Gerhard', 1],
    ['Pedrouzo, Lucía & Cobo, M. Carmen & García-Álvarez, Óscar', 5],
    ['Salvini-Plawen, Luitfried von', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=54)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);