function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dumont, C. H. F.', 1],
    ['Gaimard, Joseph Paul', 1],
    ['Gray, George Robert', 1],
    ['Linnaeus, Carolus', 3],
    ['Masters, G.', 1],
    ['Mathews, Gregory M.', 2],
    ['Merrem, Blasius', 1],
    ['Muniz-Pereira, Luís C. & Vieira, Fabiano M. & Luque, José L.', 1],
    ['Ogilvie-Grant, William Robert', 1],
    ['Steadman, David W. & Takano, Oona M.', 1],
    ['Sánchez-Montes, Sokani & Colunga-Salas, Pablo', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);