function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alonso, G. M.', 3],
    ['Coleman, Charles Oliver', 1],
    ['Coleman, Charles Oliver & Krapp-Schickel, Traudl', 2],
    ['Coleman, Charles Oliver & Lörz, Anne-Nina', 3],
    ['Day, F.', 1],
    ['Goldfuss, G. A.', 1],
    ['Lowry, J. K. & Myers, A. A.', 8],
    ['Lörz, Anne-Nina', 1],
    ['Myers, A. A.', 1],
    ['Ortiz, Manuel & Winfield, Ignacio & Varela, Carlos', 1],
    ['Rousou, Maria & Plaiti, Wanda & Lowry, Jim', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);