function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gankhuyag, Enkhtsetseg & Dorjsuren, Altanchimeg & Choi, Eun Hwa', 2],
    ['Ghahari, H. & Havaskary, M. & Tabari, M. & Ostovan, H.', 5],
    ['MACHÁýKOVÁ, Lenka & FIKÁýEK, Martin', 1],
    ['Mol, Abbas', 3],
    ['Moussi, Abdelhamid & Abba, Abderrahmane & Harrat, Abboud', 1],
    ['Skejo, Josip & Rebrina, Fran & Szövényi, Gergely', 3],
    ['Taylan, Mehmet Sait & Şirin, Deniz & Sevgili, Hasan', 1],
    ['Terskov, E. N.', 2],
    ['Tishechkin, Dmitri Yu.', 1],
    ['Tlili, Haithem & Abdellaoui, Khemais', 2],
    ['Şirin, Deniz & Mol, Abbas & Taylan, Mehmet Saýt & Demýr, Eyüp', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    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);