function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Blake, Joseph (Rev.)', 1],
    ['Cavallari, Daniel C. & Dornellas, Ana Paula S.', 2],
    ['Dall, William Healey', 1],
    ['Habe, Tadashige & Ito, Kiyoshi', 2],
    ['Hansen, Thomas', 3],
    ['Jirapatrasilp, Parin & Cuny, Gilles & Kocsis, László', 2],
    ['Moore, Charles', 1],
    ['Scopoli, Giovanni Antonio', 1],
    ['Simone, Luiz Ricardo L.', 3],
    ['Sowerby, James DeCarle', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);