function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arribas, Alfonso & Garrido, Guiomar', 1],
    ['Augugliaro, Claudio & Paniccia, Chiara', 1],
    ['Don E. Wilson & Russell A. Mittermeier', 9],
    ['Erxleben, J. C. P.', 1],
    ['James H. Honacki & Kenneth E. Kinman & James W. Koeppl', 7],
    ['Kazim, Abdul-Rahman & Houssaini, Jamal & Tappe, Dennis', 2],
    ['Linnaeus, Carolus', 13],
    ['Parrini, Francesca & Cain, James W. & Krausman, Paul R.', 2],
    ['Peter Grubb', 10],
    ['Wilson, Don E. & Reeder, DeeAnn', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=58)',
    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);