function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Assi, Laurent Aké & Jérémie, Joël', 1],
    ['Chen, Feng & He, Hai', 1],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 1],
    ['Hartley, Thomas Gordon', 3],
    ['Jarvis, Charlie', 6],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 2],
    ['Linnaeus, Carolus', 2],
    ['Merrill, Elmer Drew & Perry, Lily May', 1],
    ['Molino, Jean-François & Sabatier, Daniel & Grenand, Pierre', 8],
    ['Monteiro, Francisca & Costa, Esperança Da & Kissanga, Raquel', 1],
    ['Nacoulma, Blandine M. I. & Schmidt, Marco & Hahn, Karen', 1],
    ['Plazas, Erika & Casoti, Rosana & Murillo, Monica Avila', 1],
    ['Suh, Soo-Jung', 2],
    ['Turner, Ian M.', 1],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    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);