function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Agassiz, Jean Louis Rodolphe', 1],
    ['Angulo, Arturo', 1],
    ['Angulo, Arturo & Betts, Joel T. & González-Alemán, Néstor J.', 1],
    ['Angulo, Arturo & Naranjo-Elizondo, Beatriz & Rojas, Emmanuel', 1],
    ['Chakrabarty, Prosanta & Sparks, John S.', 2],
    ['Cleva, Régis & Guinot, Danièle & Albenga, Laurent', 3],
    ['Juan J. Schmitter-Soto', 6],
    ['Prosanta Chakrabarty & John S. Sparks', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);