function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chichvarkhin, Anton', 1],
    ['Clark, Roger N. & Jewett, Stephen C.', 10],
    ['Eernisse, Douglas J. & Strathmann, Megumi F.', 3],
    ['Gale, Andy S. & Jagt, John W. M.', 1],
    ['Gerdes, Klaas & Kihara, Terue Cristina & Martinez Arbizu, Pedro', 1],
    ['Gray, John Edward', 1],
    ['Jangoux, Michel', 7],
    ['Kobayashi, Itaru & Kohtsuka, Hisanori & Fujita, Toshihiko', 2],
    ['Madeira, Patrícia & Kroh, Andreas & Cordeiro, Ricardo', 3],
    ['Mah, Christopher L.', 1],
    ['Ubagan, Michael Dadole & Lee, Taekjun & Kim, Philjae', 1],
    ['Xiao, Ning & Liao, Yulin & Liu, Ruiyu', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=41)',
    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);