function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Khazali, Azhar Mohammed & Kachel, Hamid Saeid', 1],
    ['Fomichev, Alexander A.', 9],
    ['Fomichev, Alexander A. & Marusik, Yuri M.', 3],
    ['Fomichev, Alexander A. & Marusik, Yuri M. & Koponen, Seppo', 1],
    ['Marusik & Omelko & Koponen', 1],
    ['Marusik, Yuri M. & Omelko, Mikhail M.', 8],
    ['Naumova, Maria & Blagoev, Gergin & Deltshev, Christo', 1],
    ['Omelko, Mikhail M. & Komisarenko, Anatoly A. & Marusik, Yuri M.', 1],
    ['Trilikauskas, L. A. & Sergeev, M. E.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);