function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Callmander, Martin W. & Durbin, Olivier D. & Lack, Hans-Walter', 1],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 3],
    ['Jarvis, Charlie', 3],
    ['Mille, Christian & Henderson, Rosa C. & Cazères, Sylvie', 1],
    ['Mound, Laurence & Goldarazena, Arturo & Lopez-Guillen, Guillermo', 1],
    ['Nacoulma, Blandine M. I. & Schmidt, Marco & Hahn, Karen', 1],
    ['Romero, Giovanna E.', 2],
    ['Sánchez-Sánchez, Odilón & Jiménez-Ramírez, Jaime', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);