function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Assing, Volker', 1],
    ['Eldredge, K. Taro', 1],
    ['Eldridge, K. Taro', 2],
    ['Hlaváč, Peter & Newton, Alfred F. & Maruyama, Munetoshi', 1],
    ['Majka, Christopher & Klimaszewski, Jan', 1],
    ['Maruyama, Munetoshi & Patrick, Brian & Klimaszewski, Jan', 3],
    ['Mathis, Kaitlyn A. & Eldredge, K. Taro', 3],
    ['Navarro, Bruna V. & Caron, Edilson', 1],
    ['Pace, R.', 1],
    ['Santiago-Jimenez, Quiyari J.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);