function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gilgado, José D.', 1],
    ['Golovatch, Sergei I.', 1],
    ['Sergei I., Golovatch', 2],
    ['Shear, William A. & Reddell, James M.', 1],
    ['Shear, William A. & Shelley, Rowland M.', 7],
    ['Shear, William A. & Steinmann, David B.', 6],
    ['Shear, William A. & Taylor, Steven J. & Wynne, Judson', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);