function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Evenhuis, Neal L. & O’Hara, James E. & Pape, Thomas', 1],
    ['Gibson, Ray', 4],
    ['Gibson, Ray & Strand, Malin', 3],
    ['Gibson, Ray & Sundberg, Per', 2],
    ['Gonzalez-Cueto, Jaime & Quiroga, Sigmer & Norenburg, Jon', 3],
    ['Hookabe, Natsumi & Tsuchida, Shinji & Fujiwara, Yoshihiro', 1],
    ['Kajihara, Hiroshi', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);