function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Avontuur, Juanita R. & Palmer, Marike & Beukes, Chrizelle W.', 3],
    ['Bijlani, Swati & Singh, Nitin K. & Eedara, V. V. Ramprasad', 1],
    ['Calder, Dale R. & Choong, Henry H. C.', 2],
    ['Dehio, C & Lanz, C & Pohl, R & Behrens, P & Bermond, D', 1],
    ['Jung, Hye Su & Yoon, Jung-Hoon & Joh, Kiseong & Seong, Chi-Nam', 8],
    ['Loperena-Barber, Maite & Khames, Mammar & Leclercq, Sébastien O.', 1],
    ['Panahandeh, Yousef & Pourjam, Ebrahim & Abolafia, Joaquín', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    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);