function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alipanah, Helen & Baixeras, Joaquín', 1],
    ['Helen Alipanah & Joaquin Baixeras', 1],
    ['Maharramova, Sheyda', 1],
    ['Maharramova, Sheyda & Ayberk, Hamit', 1],
    ['Muadsub, Sopita & Pinkaew, Nantasak', 3],
    ['Pathania, Prakash C. & Das, Apurva & Chandra, Kailash', 4],
    ['Pinkaew, Nantasak & Phewphanh, Phonepadith', 1],
    ['Razowski, Józef & Landry, Bernard & Roque-Albelo, Lazaro', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);