function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Banks, Nathan', 2],
    ['Borges, Paulo A. V. & Gaspar, Clara', 2],
    ['Canbulat, Savaş', 1],
    ['Hassan, Muhammad Asghar & Oswald, John D. & Zia, Ahmed', 4],
    ['Linnaeus, Carolus', 19],
    ['Müller, Otto Friedrich', 1],
    ['Pantaleoni, Roberto A. & Loru, Laura', 1],
    ['Retzius, Anders Ja ̊ han', 3],
    ['Schrank, Franz von Paula', 1],
    ['Scopoli, G. A.', 1],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 2],
    ['Tillier, Pierre', 1],
    ['Walker, Francis', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=41)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);