function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akrami, Mohammad Ali', 5],
    ['Akrami, Mohammad Ali & Shahedi, Alireza', 1],
    ['Behan-Pelletier, Valerie M. & Lindo, Zoë', 5],
    ['Hushtan, Habriel H. & Hushtan, Kateryna V. & Glotov, Sergii V.', 2],
    ['Migliorini, Massimo', 1],
    ['Murvanidze, Maka & Mumladze, Levan', 8],
    ['Norton, Roy A. & Ermilov, Sergey G.', 1],
    ['Schatz, Heinrich & Fortini, Lorenzo & Fusco, Tommaso', 2],
    ['Seniczak, Anna & Seniczak, Stanisław & Kowalski, Jarosław', 1],
    ['Sh & Hajizadeh, J. & M. A & Rafatifard, M.', 1],
    ['Weigmann, G. & Miko, L.', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=32)',
    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);