function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alberdi, Antton & Aizpurua, Ostaizka', 1],
    ['Dalhoumi, Ridha & Aissa, Patricia & Aulagnier, Stéphane', 1],
    ['Don E. Wilson & Russell A. Mittermeier', 18],
    ['Jackson, Stephen M. & Jansen, Justin J. F. J.', 1],
    ['James H. Honacki & Kenneth E. Kinman & James W. Koeppl', 6],
    ['Jo, Yeong-Seok & Baccus, John T. & Koprowski, John L.', 2],
    ['Karl F. Koopman', 8],
    ['Mucedda, Mauro & Kiefer, Ndreas & Pidinchedda, Rmanno', 1],
    ['Rosina, Valentina V. & Rummel, Michael', 1],
    ['Sachanowicz, Konrad & Ciechanowski, Mateusz & Rachwald, Alek', 2],
    ['Wilson, Don E. & Reeder, DeeAnn', 17],
    ['Yoshiyuki, Mizuko', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=59)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);