function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boettger, Oskar', 1],
    ['Guenther, Rainer & Iskandar, Djoko T. & Richards, Stephen J.', 1],
    ['Kraus, Fred', 6],
    ['Kraus, Fred & Allison, Allen', 1],
    ['Miracle, Eulàlia Gassó & Van, Lars W. & Ostende, Den Hoek', 1],
    ['Putri, Auni Ade & Fahri, Fahri & Annawaty, Annawaty', 1],
    ['Putri, Auni Ade & Trilaksono, Wahyu & Kurniati, Hellen', 1],
    ['ZWEIFEL, RICHARD G. & MENZIES, JAMES I. & PRICE, DAVID', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);