function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abolafia, Joaquín & Peña-Santiago, Reyes', 2],
    ['Alekseev, Vitalii I. & Kazantsev, Sergey V.', 1],
    ['Allman, George James', 1],
    ['Bates, Henry Walter', 1],
    ['Becker, Theodor', 1],
    ['Boisduval, Jean Baptiste Alphonse Dechauffour de', 3],
    ['Brass, E.', 1],
    ['Champion, George Charles', 1],
    ['Conradie, Werner & Branch, William R. & Measey, G. John', 1],
    ['Deuve, Thierry & Tian, Mingyi', 1],
    ['Dlussky, Gennady M. & Rasnitsyn, Alexandr P.', 1],
    ['Eigenmann, C. H.', 4],
    ['Elliot, D. G.', 1],
    ['Haddon, Alfred C. & Shackelton, Alice M.', 1],
    ['Hasanvand, Iman & Jafari, Shahriar & Khanjani, Masoumeh', 1],
    ['Other (20)', 20]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=41)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);