function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Kandari, Manal & Anker, Arthur & Hussain, Sumaiah', 1],
    ['Almeida, Alexandre O. & Terossi, Mariana & Buranelli, Raquel C.', 2],
    ['Anker, Arthur', 8],
    ['Anker, Arthur & Ahyong, Shane T.', 2],
    ['Anker, Arthur & Komai, Tomoyuki', 1],
    ['Anker, Arthur & Naderloo, Reza & Marin, Ivan', 1],
    ['Anker, Arthur & Pratama, Idham Sumarto & Firdaus, Muhammad', 3],
    ['Anker, Arthur & Ďuriš, Zdeněk', 1],
    ['Komai, Tomoyuki & Henmi, Yumi', 1],
    ['Leach, William Elford', 1],
    ['Marin, Ivan', 1],
    ['Naderloo, Reza & Türkay, Michael', 3],
    ['Ďuriš, Zdenek & Anker, Arthur', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);